MX-D-03: The Sheinbaum Security Pivot, the Sinaloa Cartel Civil War, and the Trump-2 Tariff-Fentanyl Linkage (2024–2025)

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Document Outline

Key Takeaways (7–12 substantial bullets)
The Doctrinal Inheritance — From Calderón's Drug War to AMLO's Abrazos no Balazos (2006–2024)
The Sheinbaum Security Architecture — Harfuch, SEDENA, the Guardia Nacional Constitutional Incorporation, and the Daily Security Cabinet
The 25 July 2024 El Paso Airport Apprehension — Zambada, Guzmán López, and the "Kidnapping" Narrative
The September 2024–2025 Sinaloa Civil War — Chapitos vs Mayos, Culiacán Body Counts, and the Civilian Cost
Operativo Frontera Norte and the 10,000-Troop Northern-Border Deployment — The Tariff Pause as Security Operation
The 1 February 2025 IEEPA Tariff Imposition and the 3 February 2025 30-Day Pause — Fentanyl as Pretext, Tariff as Instrument
The 20 February 2025 Foreign Terrorist Organization Designation — Six Cartels, Material-Support Law, and Mexican Sovereignty
The 27 February 2025 Transfer of 29 Cartel-Aligned Figures — Caro Quintero, Treviño Morales, and the Gesture toward Trump-2
The September 2024 Guardia Nacional SEDENA Constitutional Incorporation — Plan C Continuity and the Civilian-Military Question
Fentanyl Seizures, Laboratory Busts, and the Synthetic-Drug Supply Architecture (Sinaloa vs Jalisco)
Border Governance — Migration Cooperation, Remain in Mexico, and Title-42-Style Enforcement
The May 2025 Fentanyl-and-Migration Cooperation Framework — Operational Working Architecture
The Three-Account Assessment — Morena Republican-Sovereignty, Opposition Hawk-Critique, and Structural State-Cartel-Symbiosis Reading
Conclusion — Forward View on Cartel-State-Sovereignty Dynamics in the Early Sheinbaum Sexenio

1. Key Takeaways

The Sheinbaum security posture inaugurated on 1 October 2024 represents a substantive operational departure from the AMLO-era abrazos no balazos doctrine while preserving its rhetorical-constitutional frame, and the principal embodiment of this departure is the appointment of Omar García Harfuch Pérez de Tagle to the Secretaría de Seguridad y Protección Ciudadana (SSPC). Harfuch — a career security-intelligence figure, former federal-police operational head under Peña Nieto's Comisión Nacional de Seguridad, former Mexico City Police Chief 2019–2024 under Mayor Sheinbaum, target of the 26 June 2020 Cártel de Jalisco Nueva Generación (CJNG) Lomas de Chapultepec assassination attempt that he survived after sustaining three gunshot wounds — operates a self-described inteligencia técnica approach centred on financial-and-communications intelligence, targeted arrests of mid-and-high-level operatives, fentanyl-precursor-and-laboratory seizures, and the Estrategia Nacional de Seguridad 2024–2030 announced on 8 October 2024. The departure is operational rather than doctrinal: AMLO's atender las causas (address the underlying causes) language and welfare-as-security frame are preserved publicly by Sheinbaum, but the operational tempo — measured by arrests, seizures, and extraditions — has shifted measurably upward from the AMLO baseline.
The 25 July 2024 apprehension of Ismael "El Mayo" Zambada García (born 1 January 1948 in El Álamo, Sinaloa; co-founder of the Sinaloa Cartel; the senior surviving original-generation figure after the January 2016 third capture and 2017 extradition of Joaquín "El Chapo" Guzmán Loera) and Joaquín Guzmán López (the youngest of the four Chapitos sons of El Chapo) at Doña Ana County International Jetport near El Paso, Texas, was the most consequential single security event of the period under review and the proximate trigger of the September 2024 Sinaloa civil war. The competing narratives — that Zambada was lured by Guzmán López under the pretext of an inspection of property near Sinaloa and physically forced onto a private aircraft (the "kidnapping" account, advanced by Zambada's lawyer Frank Pérez in a July 2024 public letter and reaffirmed in subsequent court filings); that Guzmán López voluntarily surrendered as part of a US plea-and-cooperation arrangement and brought Zambada with him; and that the US authorities had advance operational knowledge versus that the apprehension was an opportunistic outcome of an internal-cartel-betrayal — remain partially unresolved as of mid-2026, but the operational consequence is documented: the Sinaloa Cartel fractured along the Chapitos-versus-Mayos fault line beginning in early September 2024.
The Sinaloa civil war that erupted in Culiacán and across the state of Sinaloa from early September 2024 is the most acute single-region intra-cartel conflict in Mexican post-2000 organised-crime history. Casualty figures vary substantially by source: SSPC monthly reports record [TBD-VERIFY: precise figure, with Sinaloa state SSPC reports tracking a cumulative figure exceeding 1,000 homicides between September 2024 and April 2025]; Lantia Consultores compilations of organised-crime-attributable killings track a figure in the range of [TBD-VERIFY: 1,200–1,800 cumulative]; RIODOCE Sinaloa and Noroeste ground-level reporting documents additional categories of disappearances, vehicle-burnings, and forced displacements that are not consistently captured in federal SSPC figures. The civilian-displacement figure — the number of Sinaloan families that left rural municipalities (Badiraguato, Cosalá, San Ignacio, Mocorito) for Culiacán, other Mexican cities, or northbound migration — is the consequential human-cost measure and remains [TBD-VERIFY: in the tens of thousands by most estimates]. The Sheinbaum government has consistently characterised the Sinaloa situation as a conflicto entre grupos delincuenciales (conflict between criminal groups) rather than a general security collapse, and has deployed the Plan Integral para la Atención de la Violencia en Sinaloa — additional Guardia Nacional and SEDENA deployments, federal infrastructure investment, and welfare-programme intensification — as the operational response.
The constitutional incorporation of the Guardia Nacional (National Guard) into the Secretaría de la Defensa Nacional (SEDENA), enacted by constitutional amendment published in the Diario Oficial de la Federación on 30 September 2024 — one day before Sheinbaum's inauguration, signed by outgoing President Andrés Manuel López Obrador and operationalised under the new government — completes the Plan C constitutional sequence that AMLO began in February 2024 and that the September 2024 Morena supermajority enabled. The amendment formalises what had been the operational reality since the March 2019 Guardia Nacional creation: that the institution, while constitutionally framed as a civilian public-security body, is in practice commanded, staffed, and operated by serving military personnel. The amendment's principal effect is to remove the constitutional pretence of civilian command and to authorise the Guardia Nacional as a permanent military-administered public-security institution. The amendment generated marked constitutional-law and civil-liberties critique (Human Rights Watch, Amnesty International, Mexican civil-society networks including the Red Nacional de Organismos Civiles de Derechos Humanos "Todos los Derechos para Todas y Todos") and represented the central operational instrument through which the Sheinbaum government would implement the post-2024 security architecture.
The 25 November 2024 Trump tariff threat — President-elect Trump's Truth Social announcement that he would impose a 25 per cent tariff on all Mexican goods on his first day in office, citing fentanyl and migration as the asserted emergency justification — established the operational linkage between US trade policy and Mexican security policy that would define the bilateral through May 2025. The 1 February 2025 Executive Order 14195 imposed the tariffs under International Emergency Economic Powers Act (IEEPA) authority — the first IEEPA-based tariff imposition on a USMCA partner — and the 3 February 2025 telephone call between Sheinbaum and Trump produced the 30-day pause, conditional on the Mexican announcement of the deployment of 10,000 Guardia Nacional troops to the northern border under Operativo Frontera Norte. The deployment — operationally led by SEDENA and SSPC, with the 10,000-troop figure achieved through the redeployment of existing northern-state Guardia Nacional contingents rather than a net-new mobilisation [TBD-VERIFY: precise mix of new versus redeployed forces] — constituted the principal operational concession of the early Sheinbaum government to the Trump-2 administration and the central instrument through which the fentanyl-as-tariff-pretext logic was operationalised on the Mexican side.
The 20 February 2025 designation by the US Department of State of six Mexican organised-crime groups — the Sinaloa Cartel, the Cártel de Jalisco Nueva Generación (CJNG), the Cártel del Noreste (CDN; the post-2010 reorganisation of the Zetas remnants), La Nueva Familia Michoacana, the Cártel del Golfo (CDG), and Cárteles Unidos (the Michoacán autodefensa-and-cartel hybrid) — as Foreign Terrorist Organizations (FTOs) and Specially Designated Global Terrorists under Executive Order 14157 of 20 January 2025 represents the most consequential US security-legal designation of Mexican criminal groups in the bilateral's post-2000 history. The designation has three principal operational consequences: it activates the US federal material-support-to-terrorism statute (18 USC § 2339A and § 2339B), which carries 15-to-20-year sentences for those who knowingly provide material support to designated organisations and which exposes US businesses (and potentially Mexican businesses with US operations) to prosecution risk for transactions with cartel-linked entities; it authorises expanded US Treasury sanctions and asset-freezing authorities; and it provides a legal-political predicate for potential US military or paramilitary action against cartel infrastructure on Mexican soil — a possibility that Trump-2 administration figures (Mike Waltz, Pete Hegseth, J.D. Vance) had referenced in the campaign and the early transition. The Mexican response — Sheinbaum's 20 February 2025 statement that Mexico would not accept injerencismo (interventionism) and that bilateral cooperation must respect Mexican sovereignty, the 26 February 2025 constitutional reform initiative formalising the no-injerencia doctrine, and the cabinet's coordinated public messaging — established the sovereignty-pushback frame.
The 27 February 2025 transfer of 29 cartel-aligned figures from Mexican federal custody to United States custody is the largest single-batch transfer of organised-crime defendants in the bilateral's history. The figures included Rafael Caro Quintero (the Sinaloa-Guadalajara-era founder of the Guadalajara Cartel; convicted by the United States in absentia for the February 1985 kidnapping, torture, and murder of US Drug Enforcement Administration Special Agent Enrique "Kiki" Camarena Salazar in Guadalajara; arrested by SEDENA in Sinaloa on 15 July 2022 after seventeen years as a fugitive following his July 2013 procedural release); Miguel Treviño Morales ("Z-40", the former operational leader of the Zetas, arrested July 2013); Omar Treviño Morales ("Z-42", his brother, arrested March 2015); and 26 additional figures of varying seniority across the Sinaloa Cartel, CJNG, Cartel del Noreste, and other groups. The transfer was framed by the Mexican government as a traslado (transfer) rather than a formal extradición (extradition), invoking emergency-cooperation authority under Mexican federal procedure to bypass the prolonged extradition-review pathway. The transfer represented the principal operational gesture of the Sheinbaum government toward the Trump-2 administration's enforcement agenda and produced significant domestic-political contestation regarding the bypass of the formal extradition process and the precedent for future emergency transfers.
Operativo Frontera Norte — the post-February 2025 northern-border deployment operation announced by Sheinbaum and operationalised by Harfuch and Secretary of Defence General Ricardo Trevilla Trejo — established the post-tariff-pause security-operational template. The operation's principal operational components: the 10,000-Guardia Nacional deployment along the northern border concentrated in Baja California, Sonora, Chihuahua, Coahuila, Nuevo León, and Tamaulipas; expanded SEDENA fentanyl-precursor-laboratory seizures across Sinaloa, Sonora, and Jalisco (the Operación Enjambre component); enhanced port-of-entry inspection cooperation with US Customs and Border Protection; and the daily operational reporting in the SSPC Martes de Seguridad press conferences that became Harfuch's principal communications vehicle. The cumulative fentanyl-and-methamphetamine seizure figures announced through the post-February 2025 Operativo Frontera Norte sequence notable exceeded the AMLO-era cumulative [TBD-VERIFY: precise SEDENA and SSPC seizure figures by category and month].
Three contested-record accounts structure the assessment of the early Sheinbaum security trajectory. First, the Morena republican-sovereignty account: that the Sheinbaum government has successfully managed an unprecedented bilateral security-and-trade shock through a measured, sovereignty-preserving, results-oriented posture; that the Harfuch operational pivot has delivered considerable operational results without abandoning the AMLO-era atender las causas frame; that the Guardia Nacional constitutional incorporation rationalises an institution that has been operationally military since 2019; and that the 27 February 2025 transfers and Operativo Frontera Norte deployment demonstrate Mexico as a sovereign partner that cooperates from strength rather than capitulates from weakness. Second, the opposition-and-US-security-hawk critique: that the Sheinbaum response to the Trump-2 pressure has been operationally meaningful but doctrinally insufficient; that the cartel-FTO designation should have been invited rather than resisted because of the material-support legal leverage it provides; that the Guardia Nacional SEDENA incorporation completes the militarisation of Mexican public security without delivering measurable rule-of-law gains; and that the post-El-Mayo Sinaloa civil war demonstrates the structural failure of any cartel-management strategy that relies on tacit-state-and-cartel equilibria. Third, the structural-reading account: that the regional-governance reality across material parts of Mexico (Sinaloa, parts of Guerrero, Michoacán, Tamaulipas, Zacatecas) is a state-cartel symbiosis in which formal state institutions, organised-crime groups, local political actors, and licit-economic interests are entangled in operational governance arrangements that no single doctrinal pivot — whether AMLO's abrazos, Sheinbaum-Harfuch's inteligencia técnica, Calderón's Drug War, or hypothetical US-led FTO-frame enforcement — can dissolve; that the Sinaloa civil war is the visible eruption of this underlying structure rather than its anomaly; and that the bilateral-security framework will continue to oscillate between doctrinal pivots without addressing the structural conditions.
The forward trajectory through 2025–2026 is conditional on three principal variables. First, the stability of the May 2025 fentanyl-and-migration cooperation framework — whether the operational working architecture that emerged after the April 2025 partial-tariff resolution can be sustained through the USMCA 2026 review window, or whether further tariff shocks will require additional operational concessions. Second, the trajectory of the Sinaloa civil war — whether the Chapitos-versus-Mayos conflict stabilises into a renewed equilibrium (with either faction predominant, or a fragmented stable territorial division), continues at high-intensity through 2025–2026 with continuing civilian cost, or expands into broader inter-cartel realignment as CJNG, CDN, and other groups exploit the Sinaloa weakness. Third, the political-constitutional consequences of the FTO designation and the precedent of the 27 February 2025 transfers — whether the Mexican constitutional and political system absorbs these as one-off bilateral-cooperation instruments or whether they establish a precedent that subsequent administrations and subsequent shocks can invoke. The early-period evidence through mid-2025 suggests an operational stabilisation under conditions of continuing structural strain, with the three contested-record accounts remaining marked unresolved.

2. The Doctrinal Inheritance — From Calderón's Drug War to AMLO's Abrazos no Balazos (2006–2024)

The Sheinbaum security architecture cannot be understood without reference to the two preceding doctrinal phases that defined Mexican federal security policy across the eighteen years between December 2006 and October 2024. The Calderón Drug War phase (1 December 2006 through 30 November 2012) — operationalised through Felipe Calderón Hinojosa's 11 December 2006 Operativo Conjunto Michoacán announcement nine days into his presidency, and structured around the deployment of the Mexican armed forces (SEDENA and the Secretaría de Marina, SEMAR) in lead-actor public-security roles across the Pacific and Gulf cartel-territory regions — established the kingpin strategy template that Peña Nieto preserved and that AMLO ostensibly repudiated. The Calderón-era cumulative homicide figure — INEGI records approximately 121,683 homicides nationally between 2007 and 2012, of which a significant fraction were classified by Mexican federal authorities as organised-crime-attributable [TBD-VERIFY: precise organised-crime-attribution percentage, with Lantia and CIDE estimates varying from 40 to 60 per cent of the cumulative] — and the cartel atomisation effect (the post-kingpin-capture fragmentation of the Beltrán Leyva, La Familia Michoacana, Zetas, and other groups into smaller, more numerous, and frequently more violent successor organisations) constituted the principal contested-legacy of the phase.

The Peña Nieto phase (1 December 2012 through 30 November 2018) preserved the kingpin strategy operational template — the 22 February 2014 second capture of Joaquín "El Chapo" Guzmán Loera in Mazatlán by SEMAR; the 11 July 2015 Túnel de Almoloya escape from the Federal Centre for Social Readaptation Number 1; the 8 January 2016 third capture by SEMAR in Los Mochis; the 19 January 2017 extradition to the Eastern District of New York on the eve of the Trump-1 inauguration — while attempting to rebrand the security narrative through the Gendarmería Nacional (created January 2014) and the rhetoric of seguridad ciudadana (citizen security) rather than guerra contra el narco (war on narco). The phase produced the Iguala-Ayotzinapa September 2014 disappearance of the 43 Ayotzinapa normalista students (the most consequential single state-cartel-collusion event of the period; the procedural-investigation record is documented at MX-B-03), the post-2014 Zetas fragmentation into the Cártel del Noreste and the Cartel del Golfo Vieja Escuela / Metros / Rojos fractions, and the post-2017 CJNG ascent into the principal national-level competitor to the Sinaloa Cartel. The Peña Nieto record was notable shaped by the post-fact December 2022 New York federal jury conviction of former Secretary of Public Security and Calderón-era security minister Genaro García Luna on five counts of cocaine trafficking and conspiracy — a conviction that the AMLO and Sheinbaum administrations have invoked as definitive evidence of the structural state-cartel-collusion of the Drug War era and as the principal justification for the post-2018 doctrinal pivot.

The AMLO abrazos no balazos phase (1 December 2018 through 30 September 2024) constituted the most consequential doctrinal repudiation of the post-2006 framework. The phrase — abrazos no balazos (hugs not bullets), invoked by AMLO across his 2018 campaign, his early presidency, and his daily mañanera press conferences — captured the doctrinal commitment to address the causas estructurales (structural causes) of cartel recruitment through welfare programmes (the Becas Benito Juárez educational stipends, the Sembrando Vida rural-employment programme, the Jóvenes Construyendo el Futuro youth-apprenticeship programme) rather than through kinetic confrontation. The doctrine's operational expression was the Estrategia Nacional de Seguridad Pública 2018–2024, the March 2019 constitutional creation of the Guardia Nacional as a civilian-framed public-security institution that absorbed the Federal Police's operational personnel and that constitutionally required civilian command (the so-called Acuerdo del 11 de mayo de 2020 by which AMLO authorised the armed forces' continued public-security role through 2024), and the daily 6:00am gabinete de seguridad (security cabinet) meetings that AMLO chaired across the sexenio.

The abrazos no balazos doctrine produced three contested outcomes that the Sheinbaum government has inherited. First, the cumulative homicide figure — INEGI records approximately 199,000 homicides nationally between 2019 and 2024, the highest cumulative sexenio figure in modern Mexican history [TBD-VERIFY: precise INEGI total]. AMLO's defenders (Viridiana Ríos, John Ackerman, La Jornada commentary) noted that the year-on-year homicide trajectory peaked in 2019 at approximately 36,773 and declined to approximately 30,968 in 2023 — a meaningful decline though from an elevated baseline. Critics (Alejandro Hope until his April 2024 death, Eduardo Guerrero of Lantia Consultores, Carlos Pérez Ricart) noted that the cumulative sexenio figure considerable exceeded the Peña Nieto cumulative and that the disappearance figure (the Registro Nacional de Personas Desaparecidas y No Localizadas recorded approximately 50,000 additional disappearances across the sexenio) was a particularly acute indicator. Second, the cartel-territorial-expansion record — the Sinaloa Cartel and CJNG expanded into territories where they had not previously operated (Guanajuato, Zacatecas, Chiapas, Quintana Roo), and intra-cartel and inter-cartel conflicts produced sustained violence in regions (Guanajuato, Zacatecas, Michoacán) that had not previously been principal Drug War fronts. Third, the Culiacanazo event of 17 October 2019 — the Mexican federal forces' attempted arrest of Ovidio Guzmán López in Culiacán, the Sinaloa Cartel's coordinated armed response with several hundred operatives blocking Mexican federal forces across the city, and AMLO's same-day decision to release Guzmán in order to prevent further casualties — became the principal symbolic indictment of the abrazos no balazos doctrine for critics and the principal AMLO-government-defence reference of cuidar la vida (protect life) over operational outcome for defenders.

The doctrinal inheritance that Sheinbaum and Harfuch received on 1 October 2024 was therefore structurally complex. The abrazos no balazos frame was politically untouchable within the Morena coalition — AMLO's continuing informal authority, the Cuarta Transformación narrative coherence, and the welfare-and-cartel-causes argument required the formal preservation of the doctrine. But the operational record across 2019–2024 — particularly the post-2022 CJNG-versus-Sinaloa territorial competition, the post-2023 Sinaloa Cartel internal tensions that would erupt as the September 2024 civil war, and the structural fentanyl-export-economy expansion that the Trump-1 and Biden administrations had been raising as bilateral concerns since 2019 — required operational departure. The resolution of this tension is the Sheinbaum-Harfuch operational architecture documented in the following sections: rhetorical preservation of atender las causas, operational substitution of inteligencia técnica, and the recasting of the AMLO doctrinal frame through the Estrategia Nacional de Seguridad 2024–2030 presented on 8 October 2024.

3. The Sheinbaum Security Architecture — Harfuch, SEDENA, the Guardia Nacional Constitutional Incorporation, and the Daily Security Cabinet

The post-1 October 2024 security architecture is structured around five principal institutional actors and three operational instruments. The five actors: the President of the Republic (Sheinbaum, who chairs the daily 6:00am gabinete de seguridad continued from AMLO and the weekly Martes de Seguridad public press conferences); the Secretary of Public Security and Citizen Protection (García Harfuch at SSPC, the operational-coordination and intelligence-lead figure); the Secretary of National Defence (General Ricardo Trevilla Trejo at SEDENA, the SEDENA-and-Guardia Nacional operational commander); the Secretary of the Navy (Admiral Raymundo Pedro Morales Ángeles at SEMAR, the maritime-and-coastal operational lead); and the Attorney General of the Republic (the FGR Fiscalía General de la República, the formal investigative-and-prosecutorial authority). The architecture's coordination mechanism is the daily security cabinet — chaired by Sheinbaum (with the President's physical attendance, distinct from AMLO's frequent delegated attendance through Adán Augusto López and Rosa Icela Rodríguez), running 6:00–7:00am Monday-through-Friday, with attendance comprising the five principal actors plus the Secretary of the Interior (Rosa Icela Rodríguez), the head of the Centro Nacional de Inteligencia (CNI, the rebranded former CISEN), and rotating attendance from state-level security secretaries.

García Harfuch's institutional position is the central operational hinge of the architecture. His biography is unusually well-documented: born 28 October 1981 in Mexico City; grandson of Marcelino García Barragán (the Secretary of National Defence under President Gustavo Díaz Ordaz during the October 1968 Tlatelolco massacre); career federal-security professional through the post-2007 federal-police reorganisation; senior official under the Peña Nieto-era Comisión Nacional de Seguridad and the AIC (Agencia de Investigación Criminal); appointed Mexico City Secretary of Public Security in October 2019 by then-Head of Government Sheinbaum; survivor of the 26 June 2020 CJNG assassination attempt in Lomas de Chapultepec (an attack involving approximately 28 operatives, BARRETT M82 .50 calibre rifles, and a Barrett-equipped pickup truck that ambushed Harfuch's convoy; Harfuch survived after sustaining three gunshot wounds, his bodyguards Javier Espinoza and Gilberto Fonseca were killed, and a bystander María Concepción Bartolo was killed by a stray round); the architect of the post-2020 Mexico City crime-reduction record that became the principal operational reference of the Sheinbaum Mexico City period.

The Harfuch operational doctrine — articulated in the Estrategia Nacional de Seguridad 2024–2030 of 8 October 2024 and in the weekly Martes de Seguridad press conferences across the post-October 2024 period — is structured around four principal components. First, inteligencia técnica: the prioritisation of financial-intelligence (FIU/UIF tracking of cartel-linked transactions), communications-intelligence (CNI and DEA-cooperation channel exploitation), and digital-forensic capabilities for the targeting of mid-and-high-level cartel operatives, rather than the territorial-presence-and-show-of-force model that characterised the Calderón-era and the early-Guardia-Nacional approach. Second, atención a las causas: the rhetorical preservation of the AMLO welfare-as-security frame, with the Becas Benito Juárez, Adultos Mayores, and Sembrando Vida programmes continued and the new Sheinbaum-era Pensión Mujeres Bienestar (women's welfare pension) added. Third, coordinación federal-estatal-municipal: a renewed emphasis on the institutional coordination across the federal-state-municipal layers, partly enabled by the post-2024 Morena political dominance across most major states. Fourth, resultados medibles: the publication of arrests, seizures, and extraditions in measurable monthly figures through the Martes de Seguridad press conferences and the SSPC monthly reports.

The constitutional incorporation of the Guardia Nacional into SEDENA — the constitutional amendment published in the Diario Oficial de la Federación on 30 September 2024 — completed the institutional rationalisation that AMLO had begun and that the September 2024 Morena supermajority enabled. The amendment's principal articles modified Articles 13, 16, 21, 31, 32, 36, 55, 73, 76, 78, 82, 89, and 123 of the Constitution to: place the Guardia Nacional under the operational and disciplinary authority of SEDENA; preserve the institution's nominal public-security mission while authorising its participation in seguridad interior (interior security) under presidential direction; authorise the participation of serving military personnel in the Guardia Nacional without loss of military status; and extend the constitutional authorisation for armed-forces participation in public security through 2028 (later actions through Plan C would extend this further). The amendment was approved in the Chamber of Deputies on 24 September 2024 (362–133 [TBD-VERIFY: precise vote]) and in the Senate on 25 September 2024 (86–42 [TBD-VERIFY: precise vote]), with the constitutional-state-legislature-ratification process completed across the 32 state legislatures within seventy-two hours through the post-September 2024 Morena-dominated state-legislative architecture.

The amendment's operational consequence is that the Guardia Nacional — which had been operationally military since its March 2019 creation but constitutionally civilian under a fiction sustained by AMLO's 11 May 2020 decree — is now constitutionally and operationally military, commanded by a serving SEDENA general (General José Carlos Beltrán Benítez as the post-October 2024 Guardia Nacional commander) under the direct authority of the Secretary of National Defence. The amendment's principal critique — advanced by Human Rights Watch (its 2 October 2024 statement), Amnesty International, the Red Nacional de Organismos Civiles de Derechos Humanos, the Centro Pro de Derechos Humanos, the Comisión Mexicana de Defensa y Promoción de los Derechos Humanos, and a meaningful fraction of Mexican constitutional-law academics — was that the amendment completed the militarización (militarisation) of Mexican public security without delivering the civilian-oversight, accountability, and rule-of-law institutional gains that the post-1997 democratic-transition consensus had required.

The Sheinbaum government's response to the militarisation critique has been consistent across the post-October 2024 period: that the Guardia Nacional under SEDENA command remains constitutionally bound to public-security mission and human-rights protections; that the historical accountability problems of pre-2019 federal-police forces (the Iguala-Ayotzinapa state-cartel-collusion, the García Luna Drug War corruption) justify the rationalisation of the institution under the more-institutionally-disciplined SEDENA; and that the Guardia Nacional SEDENA command is operationally distinct from the Mexican Army deployment in public-security roles. The material contestation — whether the SEDENA-commanded Guardia Nacional delivers measurably different operational and human-rights outcomes than direct Mexican Army deployment — remains empirically open as of mid-2026.

4. The 25 July 2024 El Paso Airport Apprehension — Zambada, Guzmán López, and the "Kidnapping" Narrative

The single most consequential security event of the period covered by this document occurred more than two months before Sheinbaum's inauguration but produced its principal operational consequences across the post-October 2024 period. The 25 July 2024 apprehension of Ismael "El Mayo" Zambada García and Joaquín Guzmán López at Doña Ana County International Jetport (a small general-aviation airport in Santa Teresa, New Mexico, near the El Paso–Ciudad Juárez border crossing) by United States federal authorities (Federal Bureau of Investigation and Drug Enforcement Administration personnel coordinated through the El Paso US Attorney's Office) was the most consequential single capture of an original-generation Mexican organised-crime figure since the 8 January 2016 third capture of Joaquín "El Chapo" Guzmán Loera in Los Mochis.

Zambada — 76 years old at the time of his apprehension; co-founder of the Sinaloa Cartel with Guzmán Loera and others through the late-1980s-and-1990s reorganisation of the post-1989 Guadalajara Cartel; the principal continuing-operational-authority figure of the Sinaloa Cartel after Guzmán Loera's 2017 extradition; the figure most associated with the post-2010s consolidation of the Sinaloa Cartel's Pacífico fentanyl-precursor-supply-and-laboratory infrastructure across Sinaloa, Sonora, and Nayarit; and a defendant in long-pending US federal indictments in the Eastern District of New York, the Southern District of California, and the District of Columbia — had been the most senior Mexican organised-crime figure at liberty between 2017 and 2024. His apprehension constituted the most consequential capture of a Mexican cartel figure since the El Chapo extradition.

Guzmán López — 38 years old at the time of his apprehension; the youngest of the four sons of El Chapo by Griselda López Pérez (the other three sons being Iván Archivaldo, Jesús Alfredo, and Ovidio); the leader of the Chapitos faction of the Sinaloa Cartel that emerged after Guzmán Loera's 2017 extradition and that became the principal operator of the Sinaloa Cartel's fentanyl-export-to-the-United-States infrastructure; a defendant in US federal indictments in the Northern District of Illinois and elsewhere — had been a subject of US extradition requests since 2018 and was at liberty in Mexico despite a January 2023 arrest of his brother Ovidio Guzmán López in the second Culiacanazo of that date (with Ovidio's eventual September 2023 extradition to the United States and his July 2025 plea-deal agreement in the Northern District of Illinois that would later become operationally significant).

The competing narratives of the 25 July 2024 apprehension have remained partially unresolved but the principal accounts are marked documented. The first account, advanced by Zambada's US legal counsel Frank Pérez in a 9 August 2024 letter publicly released through court filings: that Zambada had been invited by Guzmán López to a meeting on 25 July 2024 near Culiacán, ostensibly to mediate a political dispute between Sinaloa governor Rubén Rocha Moya and former Sinaloa congressman Héctor Cuén Ojeda; that Zambada had attended the meeting expecting to discuss the political situation; that upon arrival at the meeting location, Zambada had been physically restrained, bound, and forced onto a small aircraft; that he had then been flown across the border to the United States against his will; and that the operation had involved a planned betrayal by Guzmán López, possibly in coordination with US authorities, in exchange for prosecutorial consideration. The account characterises the operation as a secuestro (kidnapping) of Zambada from Mexican territory.

The second account, partially documented in subsequent US federal court filings and in DEA and FBI background briefings: that Guzmán López had been in cooperation contact with US authorities prior to 25 July 2024; that the operation was a planned voluntary surrender by Guzmán López that included his bringing Zambada with him; that Zambada was indeed not a voluntary participant but that the operation was understood by US authorities in advance; and that the precise sequence of events on Mexican territory before the flight to New Mexico remains classified or contested. The account is consistent with subsequent US federal indictment-and-plea-deal sequences and with reporting in The New York Times (Alan Feuer reporting), The Washington Post, and Reuters across August 2024 – February 2025.

The third account, advanced by elements of Mexican government commentary in the immediate aftermath: that the apprehension was an unauthorised US operation on or near Mexican territory that violated the bilateral cooperation framework and Mexican sovereignty. AMLO's 26 July 2024 mañanera press conference characterised the event as one for which Mexican authorities had had no advance notice and demanded full US clarification. SRE Secretary Alicia Bárcena issued formal diplomatic protest. The account framed the event as a sovereignty violation regardless of the operational sequence on Mexican soil.

The unresolved questions in the apprehension narrative — whether Mexican federal authorities had advance knowledge in any form; whether the flight took off from Mexican or US territory; whether the operation involved formal extradition-pathway bypass; whether the Sinaloa political-dispute pretext (involving Rocha Moya and Cuén Ojeda) was a coincidental cover or an instrumental element; and whether the Cuén Ojeda murder on 25 July 2024 in Culiacán was operationally connected — remain unresolved as of mid-2026. The Mexican government, the US government, the Zambada defence, and the Guzmán López defence have each maintained distinct accounts. The principal corpus-relevant conclusion is that the apprehension's operational consequence — the September 2024 Sinaloa civil war — is documented and significant regardless of which narrative of the apprehension is correct.

The immediate operational consequence of the 25 July 2024 apprehension was the fracture of the Sinaloa Cartel along the Chapitos-versus-Mayos fault line. The Sinaloa Cartel had since approximately 2017 operated as a federated structure with the Chapitos faction (the four Guzmán Loera sons and their operational networks) responsible for the post-2017 fentanyl-export-to-the-US expansion and the Mayos faction (Zambada and his sons, particularly Ismael Zambada Imperial "El Mayito Gordo" and Vicente Zambada Niebla "El Vicentillo", the latter of whom had been in US custody since 2010) responsible for the more traditional cocaine-and-methamphetamine-and-marijuana-export operations and the principal-operational-authority within Sinaloa. The relationship had been characterised by Mexican and US security analysts (Lantia, Insight Crime, the DEA) as a modus vivendi of operational cooperation across distinct portfolios.

The 25 July 2024 apprehension shattered the modus vivendi. The Mayos faction interpreted Guzmán López's role in the apprehension as a betrayal of Zambada and as an act of war. The Zambada family — particularly Ismael Zambada Imperial, who emerged as the operational leader of the Mayos faction after his father's apprehension — moved to retaliate. The Chapitos faction — with Iván Archivaldo Guzmán Salazar and Jesús Alfredo Guzmán Salazar as the remaining-at-liberty principal leaders after the apprehension of Ovidio in January 2023 and Joaquín in July 2024 — moved to defend their territorial and operational positions. The conflict erupted operationally across Culiacán in early September 2024 with a sequence of high-visibility kidnappings, killings, and territorial clashes that would define the post-September 2024 security trajectory in Sinaloa. The detailed trajectory of the civil war is documented in Section 5.

5. The September 2024–2025 Sinaloa Civil War — Chapitos vs Mayos, Culiacán Body Counts, and the Civilian Cost

The Sinaloa civil war that began operationally on 9 September 2024 with a coordinated Mayos-attributed sequence of armed actions in Culiacán constitutes the most acute single-region intra-cartel conflict of the post-2000 Mexican organised-crime period. The trigger date is documented by Sinaloa state SSP (Secretaría de Seguridad Pública estatal) and SSPC federal reporting: in the early-morning hours of 9 September 2024, coordinated armed-group movements across the Culiacán metropolitan area produced a sequence of vehicle blockades, kidnappings of Chapitos-aligned individuals from their homes, and the first organised-attribution killings of the conflict. By the end of the first week of the conflict (9–15 September 2024), Sinaloa state SSP reporting recorded approximately 30 conflict-attributable homicides; by the end of September 2024, the cumulative figure had reached approximately 110 conflict-attributable homicides; and by April 2025, the cumulative figure stood at [TBD-VERIFY: between 1,000 and 1,800 depending on source — SSPC reports a figure in the lower end, Lantia Consultores and RIODOCE compile higher figures including disappearances and unidentified bodies].

The conflict pit two factions that emerged from the 25 July 2024 US apprehension of Sinaloa Cartel founder Ismael "El Mayo" Zambada García (Section 4) and, the same day, the Culiacán assassination of former state congressman Héctor Cuén Ojeda — the Mayos-attributed pretext event: the Mayos, operating through Zambada's sons Ismael Zambada Sicairos and Ismael Zambada Imperial and based in southern Sinaloa, against the Chapitos, operating through Iván Archivaldo and Jesús Alfredo Guzmán Salazar (sons of Joaquín "El Chapo" Guzmán) and based in the north. RIODOCE, Noroeste, and national reporting documented targeted assassinations — including an 8 September 2024 killing of a Sinaloa Cartel financial-operations figure [TBD-VERIFY: precise name and attribution] immediately preceding the 9 September outbreak — cross-faction kidnappings used as exchange leverage, vehicle-blockade-and-burning intimidation, and rural-territorial clashes. The civilian cost was substantial: displacement in the tens of thousands from rural municipalities [TBD-VERIFY: tens of thousands by most estimates; the Comisión Nacional de los Derechos Humanos (CNDH), the Comisión Mexicana de Defensa y Promoción de los Derechos Humanos, and the Instituto Mexicano de Derechos Humanos y Democracia have documented displacement patterns but the precise federal figure varies], sustained school closures in Culiacán with deteriorating education indicators through Q4-2024–Q1-2025 [TBD-VERIFY: precise indicators], and measurable Sinaloa state-GDP deceleration against the national trajectory [TBD-VERIFY: precise INEGI quarterly state GDP figures].

The Sheinbaum government's operational response — the Plan Integral para la Atención de la Violencia en Sinaloa announced in October 2024 — deployed additional Guardia Nacional and SEDENA contingents to Sinaloa (the figure announced in October 2024 was 600 additional Guardia Nacional and SEDENA personnel, subsequently expanded across November 2024 – February 2025 to approximately 11,000 total federal-forces personnel deployed in Sinaloa [TBD-VERIFY: precise figures]); committed federal infrastructure investment in conflict-affected rural municipalities; expanded welfare-programme intensity (the Becas Benito Juárez, Adultos Mayores, Sembrando Vida, and the new Pensión Mujeres Bienestar programmes); and coordinated with Sinaloa state government (Governor Rubén Rocha Moya, a Morena figure with meaningful post-2024 political weight) on infrastructure-and-welfare-programme coordination. The Sheinbaum government's characterisation of the conflict as a conflicto entre grupos delincuenciales rather than a general security collapse was politically consequential — it preserved the AMLO-era welfare-as-security frame while enabling the Harfuch-led operational deployment.

The conflict's trajectory across late 2024 and the first quarter of 2025 has not produced a clear faction-resolution. The Mayos faction has retained operational presence in southern Sinaloa and significant urban areas of Culiacán; the Chapitos faction has retained operational presence in northern Sinaloa and the Badiraguato region. The pre-2024 federated structure has been replaced by a high-intensity competitive structure with no clear dominant faction. The cross-cartel implications — particularly the CJNG's potential exploitation of Sinaloa weakness, and the Cartel del Noreste's parallel competitive moves — have produced cascading effects in adjacent regions (Sonora, Chihuahua, parts of Zacatecas) [TBD-VERIFY: precise cross-region cascade evidence]. The conflict remains active as of mid-2026 with continuing weekly casualty reporting.

6. Operativo Frontera Norte and the 10,000-Troop Northern-Border Deployment — The Tariff Pause as Security Operation

The 3 February 2025 announcement by Sheinbaum of the deployment of 10,000 Guardia Nacional personnel to the northern border — produced in the context of the same-day telephone call with President Trump that yielded the 30-day pause of Executive Order 14195 — constituted the principal operational concession of the early Sheinbaum government to the Trump-2 administration and the central instrument through which the fentanyl-as-tariff-pretext logic was operationalised on the Mexican side. The operation's formal designation was Operativo Frontera Norte; its operational command was vested in SSPC (Harfuch) and SEDENA (General Trevilla) under joint coordination; and its principal mission was the interdiction of cross-border fentanyl, methamphetamine, and irregular migration flows.

The 10,000-troop figure was achieved primarily through the redeployment of existing Guardia Nacional contingents from the northern-border states (Baja California, Sonora, Chihuahua, Coahuila, Nuevo León, Tamaulipas) and from adjacent states (Sinaloa, Durango, Zacatecas), supplemented by additional SEDENA-and-SEMAR personnel and by deployment of Guardia Nacional personnel from central Mexican states. The Mexican government's characterisation that this was a 10,000-troop additional deployment — versus a material-redeployment-and-relabelling exercise — was contested in subsequent reporting by Animal Político, Proceso, and El Universal [TBD-VERIFY: precise breakdown of new versus redeployed forces]. The operational reality across February–April 2025 was that the Guardia Nacional presence in the northern-border region was marked increased relative to the pre-February 2025 baseline, and that the operational tempo of fentanyl-and-precursor seizures, vehicle inspections at and approaching ports of entry, and laboratory raids in northern-border states was measurably elevated.

The operation's principal operational components across February–May 2025 included: the Plan Operativo Frontera Norte deployment in the six northern-border states with concentration on the Tijuana-San Diego, Mexicali-Calexico, Nogales, Ciudad Juárez-El Paso, Nuevo Laredo-Laredo, and Reynosa-McAllen corridors; the Operación Enjambre synthetic-drug-laboratory seizure component, with SEDENA-led raids on fentanyl-precursor laboratories across Sinaloa, Sonora, and Jalisco; expanded port-of-entry inspection cooperation with US Customs and Border Protection and Homeland Security Investigations; and the daily operational reporting through the SSPC Martes de Seguridad press conferences. The cumulative fentanyl-and-methamphetamine seizure figures reported by SEDENA and SSPC across February–May 2025 significant exceeded the AMLO-era baseline [TBD-VERIFY: precise SEDENA monthly seizure figures by category].

The bilateral-operational consequence was the establishment of a continuous Mexican-side enforcement-and-reporting tempo that the US administration could publicly reference. The Trump-2 administration's communications across February–May 2025 — Trump statements at press conferences and on Truth Social, US Customs and Border Protection statistics, DEA briefings — repeatedly referenced the Mexican seizure-and-deployment figures as evidence that the tariff threat had produced operational results. The Mexican government's communications — Sheinbaum's mañaneras, Harfuch's Martes de Seguridad, the SRE communications — emphasised that the operations were conducted under Mexican sovereignty and on Mexican law-enforcement priorities, not at US direction.

The operation's structural-policy critique — advanced by Mexican opposition figures (PAN, MC), by US security-hawk commentators, and by some Mexican left-academic figures (Carlos Pérez Ricart, Falko Ernst at International Crisis Group) — was that the Operativo Frontera Norte deployment substituted visible operational tempo for structural-conditions intervention; that the fentanyl-precursor-supply-chain through China and the synthetic-drug-laboratory infrastructure in Sinaloa, Jalisco, and Sonora are structural features that no border deployment can disrupt; that the operational tempo would be sustainable only as long as the political-and-fiscal commitment to it was sustained; and that the operation effectively externalised the US fentanyl-policy onto Mexican territory in a way that conflicted with the formal Estrada Doctrine and no-injerencia doctrines. The Sheinbaum government's response was that the deployment was conducted on Mexican law-enforcement priorities, that the bilateral cooperation was conducted under sovereign frameworks, and that the operational results — both in interdiction and in the de-escalation of the tariff regime — justified the operational posture.

7. The 1 February 2025 IEEPA Tariff Imposition and the 3 February 2025 30-Day Pause — Fentanyl as Pretext, Tariff as Instrument

The 1 February 2025 Executive Order 14195 — Imposing Duties to Address the Situation at Our Southern Border, signed by President Trump and effective 12:01am Eastern Time on 4 February 2025 — imposed 25 per cent tariffs on most Mexican goods imported into the United States, invoking the International Emergency Economic Powers Act (IEEPA, 50 USC § 1701 et seq.) and citing as the national-emergency basis the cross-border flow of fentanyl and the irregular migration across the southern border. The Executive Order was the first IEEPA-based imposition of broad tariffs on a USMCA partner and was paralleled by analogous Executive Order 14193 covering Canada (also 25 per cent) and Executive Order 14194 covering China (10 per cent). The detailed trajectory of the IEEPA tariff regime is documented at MX-D-02 (the Sheinbaum government anchor); this section addresses the specific fentanyl-as-pretext-tariff-as-instrument logic and its operational-security consequences.

The fentanyl-as-pretext element of the IEEPA tariff regime had three principal logical components. First, the cross-border fentanyl flow into the United States — documented in DEA National Drug Threat Assessments across 2019–2024 as the principal driver of US drug-overdose deaths, with CDC-documented annual US drug-overdose deaths reaching approximately 107,941 in 2022 before declining modestly to approximately 105,007 in 2023 and projected to decline further in 2024 — provided the national-emergency factual basis for IEEPA invocation. Second, the legal-doctrinal structure of IEEPA — which authorises the President to regulate international commerce in response to an "unusual and extraordinary threat" originating "in whole or notable part outside the United States" — required the framing of the cross-border fentanyl flow as a Mexican-originated threat that justified emergency economic regulation of Mexican commerce. Third, the political-strategic dimension — the linking of trade policy to security-and-enforcement objectives, which provided the Trump-2 administration with a continuing-leverage instrument against the Sheinbaum government across the post-February 2025 period.

The Mexican response to the IEEPA imposition operated across three principal channels. First, the formal-diplomatic channel: SRE Secretary Juan Ramón de la Fuente issued formal protest through diplomatic note; Sheinbaum's 1 February 2025 mañanera response characterised the tariffs as unjustified and damaging to both economies; and the Mexican government invoked the USMCA dispute-resolution framework in principle while not initially initiating formal proceedings. Second, the operational-security channel: the 3 February 2025 Sheinbaum-Trump telephone call produced the 30-day pause conditional on the Operativo Frontera Norte deployment, establishing the operational-security-for-tariff-pause exchange template. Third, the economic-policy channel: Banxico maintained policy-rate stability across the immediate-shock window; the peso depreciated approximately 3 per cent against the dollar across late January – early February 2025 before stabilising [TBD-VERIFY: precise depreciation range]; and the Sheinbaum government's Plan México industrial-policy framework was operationalised through expanded private-investment commitments.

The 3 February 2025 pause did not produce stable resolution. The tariff regime was reinstated on 4 March 2025 after the 30-day pause expired; partially modified on 6 March 2025 with USMCA-compliant-goods carve-outs; selectively applied to specific sectors across March–April 2025 (steel and aluminum at 12 March 2025, automotive in late March 2025); and considerable reframed on 9 April 2025 in a partial-resolution framework. The Mexican government's operational-security commitments under Operativo Frontera Norte, the 27 February 2025 cartel-figure transfers, and the May 2025 cooperation framework constituted the operational responses to the continuing tariff pressure. The bilateral relationship through May 2025 operated under the continuing fentanyl-as-pretext-tariff-as-instrument logic, with the Mexican government providing operational-security results that the US administration could publicly reference as evidence that the tariff regime was producing fentanyl-enforcement outcomes.

The structural critique of the IEEPA-tariff-fentanyl linkage — advanced by Mexican government commentary, by US trade-policy commentators (Chad Bown at Peterson Institute for International Economics, Mary Lovely at PIIE), and by USMCA-treaty-law analysts — was that the IEEPA invocation against a USMCA partner without invoking USMCA dispute-resolution procedures violated the treaty structure; that the linking of broad-base tariff regulation to enforcement objectives that are not principally trade-related distorted the function of trade policy; and that the precedent of IEEPA invocation against a USMCA partner would have continuing consequences for the bilateral and for the broader US-trade-policy architecture. The Trump-2 administration's response — that IEEPA invocation is a legitimate exercise of presidential authority in response to a documented national emergency, and that USMCA dispute resolution is not the appropriate framework for an emergency action — established the doctrinal frame that subsequent shocks would invoke.

8. The 20 February 2025 Foreign Terrorist Organization Designation — Six Cartels, Material-Support Law, and Mexican Sovereignty

The 20 February 2025 designation by US Secretary of State Marco Rubio of six Mexican organised-crime groups as Foreign Terrorist Organizations (FTOs) under Section 219 of the Immigration and Nationality Act (8 USC § 1189), and as Specially Designated Global Terrorists (SDGTs) under Executive Order 13224 (and Executive Order 14157 of 20 January 2025), constituted the most consequential US security-legal designation of Mexican criminal groups in the bilateral's post-2000 history. The designation followed Executive Order 14157 — the 20 January 2025 Trump-2 inauguration-day order directing the State Department to consider FTO designation of cartels — and the subsequent 30-day inter-agency review process.

The six designated organisations: the Sinaloa Cartel (the post-1989 Pacific-coast organisation founded by the Guzmán Loera, Zambada, and Beltrán Leyva generations); the Cártel de Jalisco Nueva Generación (CJNG, the post-2009 Jalisco-and-Pacific-coast organisation under Nemesio Rubén Oseguera Cervantes "El Mencho", the principal national-level competitor to the Sinaloa Cartel and the principal expansionist organisation of the post-2018 period); the Cártel del Noreste (CDN, the post-2010 reorganisation of the Zetas remnants under Juan Gerardo Treviño Chávez "El Huevo" until his March 2022 capture, and subsequent leaders, with principal operational presence in Nuevo Laredo and Tamaulipas); La Nueva Familia Michoacana (the post-2010 reorganisation of the Familia Michoacana remnants); the Cártel del Golfo (CDG, the historical Gulf-coast organisation in operational presence in Tamaulipas); and Cárteles Unidos (the Michoacán autodefensa-and-cartel hybrid organisation that emerged from the post-2013 Michoacán self-defence-group movement).

The FTO designation has three principal operational consequences. First, the activation of the US federal material-support-to-terrorism statute (18 USC § 2339A and § 2339B). The statute criminalises the provision of material support or resources — defined broadly to include funds, financial services, lodging, training, expert advice or assistance, safehouses, false documentation or identification, communications equipment, facilities, weapons, lethal substances, explosives, personnel, transportation, and certain other tangible and intangible support — to designated FTOs, with maximum sentences of 20 years' imprisonment (or life imprisonment if the offence results in death). The statute reaches both US persons and, under certain jurisdictional conditions, non-US persons whose conduct has meaningful US connection. The principal operational consequence is the legal exposure of US businesses, US individuals, and Mexican businesses with US-operational nexus to prosecution risk for any transaction that could be characterised as material support to a designated cartel — including, in some plausible interpretations, transactions that occur in the ordinary course of business in regions where cartels exercise effective territorial control and where some payment to cartel-linked entities is functionally unavoidable.

Second, the expansion of US Treasury sanctions and asset-freezing authorities. Under Executive Order 13224 and SDGT designation, US Treasury Office of Foreign Assets Control (OFAC) can block the property and interests in property of designated parties and of persons determined to be acting for or on behalf of designated parties or providing material support; the prohibition reaches transactions involving US persons or US-connected payments. The post-February 2025 OFAC enforcement-action sequence has produced multiple sanctions designations of individuals and entities determined to be linked to the six designated organisations [TBD-VERIFY: precise number of post-20 February 2025 OFAC designations].

Third, the legal-political predicate for potential expanded US security action. The FTO designation does not, by itself, authorise US military action on Mexican territory — that would require separate congressional authorisation, presidential authority under the Authorization for the Use of Military Force or similar, or invocation of self-defence frameworks under international law. But the designation provides the legal-political predicate that Trump-2 administration figures (National Security Advisor Mike Waltz until his replacement, Secretary of Defense Pete Hegseth, Vice President J.D. Vance) had referenced in the campaign and the early transition. The threat-of-action dimension — the public-discourse possibility that the US administration might consider military or paramilitary action against cartel infrastructure on Mexican soil — became a principal political dimension of the bilateral across the post-February 2025 period.

The Mexican response to the FTO designation has been documented and consistent across the post-20 February 2025 period. Sheinbaum's 20 February 2025 mañanera statement, repeated and elaborated in subsequent press conferences, advanced four principal arguments. First, that the designation is a unilateral US legal-administrative action that has consequences within the US legal system but does not authorise any US action on Mexican territory. Second, that Mexico will not accept injerencismo (interventionism) of any form and that any US military or paramilitary action on Mexican soil would constitute a violation of Mexican sovereignty and of international law that Mexico would respond to through all available means. Third, that bilateral security cooperation will continue under sovereign frameworks and on terms negotiated between equal-sovereign-counterparts. Fourth, that Mexico will pursue constitutional and legal reforms to strengthen the formal sovereignty-protection framework against any external intervention attempt. The 26 February 2025 constitutional-reform initiative announced by Sheinbaum — formalising the no-injerencia doctrine in the Mexican Constitution through reforms to Articles 39, 40, and 89 — operationalised the sovereignty-pushback response.

The contested-record assessment of the FTO designation involves three principal accounts. The Morena-government account: that the designation is a unilateral US action that has not changed the operational reality of bilateral cooperation, that the sovereignty-pushback has been successfully delivered, and that the operational results of the post-February 2025 period (the 27 February 2025 transfers, Operativo Frontera Norte, the May 2025 cooperation framework) demonstrate that Mexico has managed the FTO regime without capitulating to its more-aggressive operational implications. The opposition-and-US-security-hawk account (Castañeda, Dresser, Ryan Berg at CSIS, Vanda Felbab-Brown at Brookings): that the designation provides material-support legal leverage that Mexico should have welcomed rather than resisted; that the sovereignty-pushback has been performatively-strong but operationally-thin; and that the structural cartel-state-economic-nexus that the FTO designation aims to disrupt has not been operationally addressed. The structural-reading account (Pérez Ricart, Falko Ernst at International Crisis Group, WOLA commentary): that the FTO designation is a US-domestic legal-political instrument with limited operational consequence within Mexico, that the principal operational instrument of cartel-state dynamics is the regional-governance-arrangement structure that no external designation can disrupt, and that the FTO regime adds bureaucratic-legal complexity without changing the underlying structural conditions.

9. The 27 February 2025 Transfer of 29 Cartel-Aligned Figures — Caro Quintero, Treviño Morales, and the Gesture toward Trump-2

The 27 February 2025 transfer of 29 cartel-aligned figures from Mexican federal custody to United States custody — operationalised through a coordinated FGR (Fiscalía General de la República) and SSPC sequence, with the transferred figures flown from the Altiplano Federal Maximum Security Prison and other federal detention facilities to multiple US federal jurisdictions — constituted the largest single-batch transfer of organised-crime defendants in the bilateral's history and the principal operational gesture of the Sheinbaum government toward the Trump-2 administration's enforcement agenda.

The 29 transferred figures included three principal categories. First, the historically-most-prominent figures whose transfer carried particular symbolic weight: Rafael Caro Quintero (born 24 October 1952 in Badiraguato, Sinaloa; co-founder of the Guadalajara Cartel with Miguel Ángel Félix Gallardo and Ernesto Fonseca Carrillo; convicted in the United States in absentia for the February 1985 kidnapping, torture, and murder of US Drug Enforcement Administration Special Agent Enrique "Kiki" Camarena Salazar in Guadalajara — a case that became the principal reference of US-Mexican drug-enforcement cooperation across the post-1985 period and the subject of the Netflix series Narcos: Mexico dramatisation; arrested in Costa Rica in 1985 and convicted in Mexico in 1989 of various charges; released from Mexican federal custody in August 2013 on a procedural-defect court ruling that triggered material US protest; returned to fugitive status for nearly nine years; recaptured by SEMAR in Sinaloa on 15 July 2022 under the Biden administration's bilateral pressure); Miguel Treviño Morales "Z-40" (former operational leader of Los Zetas during the cartel's most-violent post-2010 expansion; arrested by SEMAR in Nuevo Laredo in July 2013); Omar Treviño Morales "Z-42" (Miguel's brother and successor as Los Zetas leader, arrested March 2015).

Second, the high-level operational figures across the Sinaloa Cartel, CJNG, Cartel del Noreste, and other groups whose transfer had operational rather than principally symbolic significance: figures including [TBD-VERIFY: precise names of additional 24 figures from the 29-figure transfer; the publicly-reported list includes among others Vicente Carrillo Fuentes brothers, José Ángel Canobbio Inzunza "El Güerito", and additional CJNG-and-Sinaloa Cartel mid-level figures]. Third, a small number of figures whose transfer had specific case-cooperation significance for ongoing US federal prosecutions.

The legal-procedural framework of the transfer was marked novel. The Mexican government characterised the transfer as a traslado (transfer) rather than a formal extradición (extradition), invoking emergency-cooperation authority under Mexican federal procedure (the Federal Law of Extradition and the National Code of Criminal Procedure provisions on inter-state and international transfer of detained persons) to bypass the prolonged extradition-review pathway. The standard extradition pathway — involving FGR formal review, SCJN appellate review, presidential authorisation, and the amparo protection-of-rights review process — typically takes between two and six years for high-profile cases. The traslado pathway compressed this to weeks through invocation of emergency-cooperation authority and bilateral agreement.

The legal-procedural critique was significant. PAN and MC opposition figures, Mexican constitutional-law academics (Jorge Carpizo McGregor's school, the Instituto de Investigaciones Jurídicas of UNAM), and human-rights advocates argued that the traslado mechanism bypassed the constitutional-procedural protections of the formal extradition pathway; that the defendants' amparo rights had been effectively suspended; and that the precedent of emergency-cooperation transfer would erode the rule-of-law framework that the post-1997 democratic-transition consensus had established. The Sheinbaum government's response was that the traslado mechanism is constitutionally and statutorily provided for in cases of bilateral security cooperation, that the defendants had had access to legal representation throughout the process, that the transfer was conducted under emergency-cooperation authority that does not require formal extradition-review proceedings, and that the operational results justified the procedural innovation.

The bilateral-political consequence of the 27 February 2025 transfers was notable. The Trump-2 administration's communications across the immediate-post-transfer period characterised the transfers as a major victory for the FTO-designation-and-enforcement strategy and as evidence that the bilateral security cooperation framework was producing results. Attorney General Pam Bondi's statement on the transfers, the DEA Administrator's statement, and Trump's Truth Social statements all emphasised the historical significance of the Caro Quintero transfer in particular as a 40-year-delayed delivery of justice in the Camarena case. The Mexican government's communications emphasised the sovereignty-preserving frame of the transfers, the bilateral-cooperation character, and the operational-result-oriented posture.

The 27 February 2025 transfers became the principal operational instrument through which the post-FTO-designation, post-tariff-shock bilateral relationship was stabilised. The transfers demonstrated to the Trump-2 administration that the Sheinbaum government would deliver operational concessions of considerable domestic-political cost in exchange for de-escalation of the tariff and FTO-enforcement pressure; they demonstrated to the Mexican opposition and to Mexican civil society that the Sheinbaum government was prepared to operationalise innovative legal-procedural mechanisms in pursuit of bilateral-cooperation results; and they established the precedent for subsequent emergency-cooperation transfers that the post-2025 period would test.

10. The September 2024 Guardia Nacional SEDENA Constitutional Incorporation — Plan C Continuity and the Civilian-Military Question

The 30 September 2024 constitutional amendment incorporating the Guardia Nacional into SEDENA — signed into the Diario Oficial de la Federación by outgoing President AMLO on his last full day in office, one day before Sheinbaum's inauguration — completed the Plan C constitutional sequence and established the institutional architecture through which the Sheinbaum security policy would operate. The amendment's meaningful content and immediate political consequences are documented in Section 3; this section addresses its position within the broader Plan C sequence and its civilian-military implications.

Plan C was AMLO's February 2024 announced sequence of 18 constitutional-reform initiatives that the Morena coalition would seek to pass after the June 2024 election, conditional on the supermajority that the election would either confirm or deny. The election delivered the supermajority in the Chamber of Deputies (with PVEM and PT in coalition with Morena reaching the two-thirds threshold of 334 seats) and a qualified-majority in the Senate (with Morena-PVEM-PT reaching 83 seats versus the 86-seat two-thirds threshold, requiring one additional opposition senator vote for two-thirds reforms; this was secured for the September 2024 judicial reform vote through PAN senator Miguel Ángel Yunes Márquez). The post-September 2024 Morena supermajority-and-qualified-supermajority enabled the rapid passage of multiple Plan C reforms: the September 2024 judicial reform (documented at MX-C-08 and MX-D-04); the 30 September 2024 Guardia Nacional SEDENA incorporation; the post-October 2024 autonomous-body restructuring (the absorption of INAI, COFECE, and CRE into executive-branch ministries); and additional pending reforms across late 2024 and 2025.

The Guardia Nacional SEDENA incorporation reform is the principal Plan C reform that bears on security policy directly. The reform's material sequence: the constitutional amendment text was approved in the Chamber of Deputies on 24 September 2024; approved in the Senate on 25 September 2024 (with the supermajority secured through opposition-senator votes); ratified by the required minimum of 17 of 32 state legislatures within 72 hours through coordinated Morena-state-legislative action; and published in the Diario Oficial de la Federación on 30 September 2024 with same-day effect. The post-1 October 2024 operationalisation involved: General Beltrán Benítez's confirmation as the post-amendment Guardia Nacional commander under SEDENA chain of command; the absorption of the Guardia Nacional's administrative-and-disciplinary functions into SEDENA's institutional framework; the alignment of Guardia Nacional training programmes with SEDENA military-training programmes; and the integration of Guardia Nacional deployment planning into the SEDENA-led national security command architecture.

The civilian-military question — whether the Mexican federal security architecture should rely principally on civilian-administered or military-administered institutions — has been the structural question of Mexican post-democratic-transition security policy. The post-1997 institutional consensus had emphasised civilian-administered federal police (the Policía Federal Preventiva from 1999, the Policía Federal from 2009) as the principal federal public-security instrument, with the armed forces as auxiliary actors deployed under presidential emergency authority. The post-2018 AMLO institutional reconstruction — the dissolution of the Policía Federal, the creation of the Guardia Nacional as nominally civilian but operationally military, and the 11 May 2020 decree extending armed-forces public-security deployment — had begun the institutional shift toward military-administered public security. The September 2024 amendment completed the shift.

The amendment's three principal marked critiques are documented. The constitutional-law critique (advanced by Diego Valadés, Sergio García Ramírez, José Ramón Cossío, and other prominent Mexican constitutional-law scholars): that the amendment alters the post-1917 constitutional framework that separates military and public-security functions; that the Guardia Nacional's constitutional incorporation into SEDENA violates the spirit if not the letter of the Article 129 prohibition on military performance of functions not directly related to military discipline; and that the amendment lacks the institutional safeguards (judicial oversight of military public-security action, civilian-authority appeal pathways, congressional oversight of military deployment) that the post-1997 consensus had developed. The human-rights critique (advanced by Human Rights Watch, Amnesty International, the Centro Pro de Derechos Humanos, the Comisión Mexicana de Defensa y Promoción de los Derechos Humanos): that the historical record of Mexican military involvement in public security includes significant documented human-rights violations (the 2010 Tlatlaya killings, the 2014 Apatzingán deaths, the 2014 Tanhuato killings, multiple disappearances and torture cases across 2006–2024), and that the Guardia Nacional SEDENA incorporation removes the (already-thin) civilian-accountability framework that had applied to Guardia Nacional operations. The democratic-transition critique (advanced by Mexican civil-society networks, by Sergio Aguayo, by Mauricio Merino): that the post-1997 democratic-transition institutional consensus — the autonomous bodies, the federal-police reform, the rule-of-law-and-accountability institutional framework — is being notable dismantled through the Plan C sequence, and that the Guardia Nacional SEDENA incorporation is one principal element of this dismantling.

The Sheinbaum government's response to these critiques is structured around three counter-arguments. First, the constitutional-rationalisation argument: that the Guardia Nacional SEDENA incorporation rationalises an institution that had been operationally military since its March 2019 creation, and that the amendment aligns constitutional form with operational reality. Second, the institutional-discipline argument: that the historical accountability problems of civilian-administered federal police forces (the Iguala-Ayotzinapa state-cartel-collusion, the García Luna Drug War corruption) demonstrate that institutional-discipline within the more-disciplined SEDENA framework is the more reliable accountability pathway. Third, the democratic-legitimacy argument: that the September 2024 amendment was passed through the constitutionally-required supermajority procedure with full deliberation; that the underlying political mandate from the June 2024 election was clear; and that the legitimacy of the constitutional reform derives from this democratic process rather than from accommodation with the pre-2018 democratic-transition consensus that the post-2018 political coalition has considerable rejected.

The empirical question of whether the SEDENA-commanded Guardia Nacional delivers measurably different operational and human-rights outcomes than the pre-amendment institutional configuration remains open. INEGI ENVIPE 2024 results, CNDH complaint-and-recommendation data, and academic monitoring (Insyde, CIDE Programa de Política de Drogas, the Causa en Común civil-society monitoring) across late 2024 and early 2025 have not produced a clear differential pattern. The structural question — whether any institutional configuration of federal security forces can address the structural cartel-state dynamics in the regions of acute conflict — remains the underlying open question that Section 14 addresses.

11. Fentanyl Seizures, Laboratory Busts, and the Synthetic-Drug Supply Architecture (Sinaloa vs Jalisco)

The synthetic-drug supply architecture that the Sheinbaum security policy has principally targeted is structured around two principal Mexican-territorial nodes — the Sinaloa-Sonora-Nayarit Pacific-coast laboratory infrastructure historically associated with the Sinaloa Cartel, and the Jalisco-Michoacán-Colima laboratory infrastructure historically associated with the CJNG — and a Pacific-coast precursor-chemical supply chain that originates principally in Chinese chemical-manufacturing facilities and arrives at Mexican ports (Manzanillo, Lázaro Cárdenas, Mazatlán) by container shipping. The architecture's principal product across the post-2018 period has been fentanyl and fentanyl-analogues, with methamphetamine production also at meaningful scale.

The Sinaloa laboratory infrastructure has been the principal target of post-October 2024 SEDENA Operación Enjambre seizures. The infrastructure is concentrated in the Sinaloa highland municipalities (Badiraguato, Cosalá, Mocorito, San Ignacio) and the Sonora-Sinaloa border region. SEDENA reporting across the post-October 2024 period has documented [TBD-VERIFY: precise number] laboratory seizures across Sinaloa state, with cumulative fentanyl-tablet, fentanyl-powder, and methamphetamine seizures material exceeding the AMLO-era baseline. The 9 December 2024 SEDENA announcement of a single seizure operation in Sinaloa producing approximately 20 kilograms of fentanyl tablets and powder constituted the largest single fentanyl seizure in Mexican federal-enforcement history [TBD-VERIFY: precise figure and date].

The Jalisco-Michoacán-Colima laboratory infrastructure has been a secondary target, with operational reporting emphasising CJNG-aligned methamphetamine production. The infrastructure is concentrated in the Jalisco interior (the Bolaños, Mezquitic, and Sierra de Mascota regions), Michoacán (the Tierra Caliente region), and Colima. The CJNG's principal operational presence in this region, combined with the post-2024 CJNG-Sinaloa competitive dynamics, has produced distinct operational challenges relative to the Sinaloa context. SEDENA reporting has documented [TBD-VERIFY: precise number] laboratory seizures across Jalisco, Michoacán, and Colima across the post-October 2024 period.

The cross-border interdiction component has been operationalised through the Operativo Frontera Norte deployment and through expanded cooperation with US Customs and Border Protection at ports of entry. The principal post-February 2025 seizure data: US CBP-reported fentanyl seizures at southern-border ports of entry declined across late-2024 and early-2025 from peak 2023 levels [TBD-VERIFY: precise CBP monthly data]; SEDENA-reported fentanyl seizures within Mexican territory increased marked [TBD-VERIFY: precise SEDENA monthly data]; and the Trump-2 administration's communications emphasised the combined US-Mexican seizure data as evidence of operational results. The structural question — whether the seizures represent supply-chain disruption that translates to reduced US-domestic fentanyl availability, or whether the supply chain is sufficiently resilient that seizures represent marginal interdiction without affecting total flow — remains analytically open.

The precursor-chemical supply chain originating in China has been a separate operational front. The US Treasury OFAC sanctions designations across the post-2019 period, the Mexican federal customs enforcement at Pacific-coast ports, and the bilateral US-Chinese-Mexican cooperation framework (such as it has functioned across 2019–2025) have been the principal instruments. The Sheinbaum government's framing has emphasised the Chinese-precursor-supply-chain element as a structural feature that no Mexican-territorial enforcement alone can disrupt, and that bilateral US-Chinese diplomacy must address. The Trump-2 administration's framing has emphasised the Mexican-territorial-laboratory element as the principal interdiction target, with the IEEPA China tariff (Executive Order 14194) addressing the Chinese supply-chain element separately.

12. Border Governance — Migration Cooperation, Remain in Mexico, and Title-42-Style Enforcement

The post-1 October 2024 border-governance dimension of the Sheinbaum security architecture — distinct from but operationally related to the cartel-security dimension — has been structured around three principal frameworks: migration-flow management through bilateral cooperation channels; the reactivation of the Remain in Mexico programme (the Migrant Protection Protocols, MPP); and the bilateral handling of asylum-and-irregular-migration enforcement in the post-Title-42 condition.

The migration-flow trajectory across late 2024 and early 2025 has been significant shaped by the post-November 2024 Trump-2 election effect and the post-January 2025 Trump-2 inauguration effect on northbound-migration incentives. US Customs and Border Protection encounter-data for the southern border declined notable across the post-November 2024 period — from peak monthly encounters in the range of 250,000 in late 2023 down to approximately [TBD-VERIFY: precise figure] in early 2025 — driven principally by the perception that the Trump-2 administration would impose considerable more restrictive enforcement than the Biden administration. The Sheinbaum government's enforcement posture at the Mexican southern border (Chiapas, the Suchiate-River-Guatemala-border) and across the Mexican territory has been meaningful continuous with the late-Biden-era bilateral arrangement, with the Programa Frontera Sur enforcement and the National Migration Institute (Instituto Nacional de Migración, INM) operational tempo maintained.

The Remain in Mexico reactivation — operationalised through bilateral US-Mexican executive-level agreement across January–March 2025 — required certain asylum-seekers at the US southern border to wait in Mexico for the adjudication of their US asylum claims, replicating the operational framework of the first Trump administration's MPP from 2019–2021. The Mexican operational consequence is the accommodation in Mexican border cities (principally Tijuana, Ciudad Juárez, Matamoros, Nuevo Laredo) of material populations of asylum-seekers from Central America, Cuba, Venezuela, Haiti, and other origins. The humanitarian-and-security challenges of these accommodations — documented by the Migration Policy Institute, the UN High Commissioner for Refugees, and Mexican civil-society networks — include vulnerability to organised-crime kidnapping and recruitment, sustained shelter-and-services demand on Mexican border-city institutions, and political tensions in Mexican border cities.

The Title-42-style enforcement question — the operational framework for rapid expulsion of irregular migrants at the southern border, replicating the public-health-based authority of Title 42 of the US Code that the Biden administration had operated 2020–2023 — has been addressed through bilateral cooperation under different formal authority. The Trump-2 administration's principal framework has been expedited-removal procedures under existing immigration statutes combined with bilateral acceptance-of-removal agreements with Mexico and other countries. The Mexican government's operational posture has been acceptance of removed third-country nationals (Central American and other) on terms negotiated with the US administration, alongside continued operation of the formal asylum-and-refugee framework within Mexican territory.

The structural-policy dimension of border governance involves the question of whether the bilateral-cooperation framework that has evolved across the post-2019 period represents a stable architecture or a continuing crisis-response sequence. The Sheinbaum government's communications have emphasised the bilateral character and the sovereign Mexican policy authority over enforcement-and-asylum operations within Mexican territory. The Trump-2 administration's communications have emphasised the US-policy-priority character of the cooperation and the contingent-upon-results dimension of the bilateral framework. The structural question — whether the post-2025 migration-cooperation framework is sustainable through the USMCA 2026 review window and beyond — remains open.

13. The May 2025 Fentanyl-and-Migration Cooperation Framework — Operational Working Architecture

The May 2025 fentanyl-and-migration cooperation framework — announced jointly by Sheinbaum and Trump on [TBD-VERIFY: precise May 2025 date and announcement format] after the 9 April 2025 partial-tariff-resolution framework — established the post-tariff-shock operational working architecture for the bilateral. The framework's principal elements: continued intensification of Mexican fentanyl-precursor-and-laboratory seizures through the Operación Enjambre and successor operations; enhanced sharing of cartel-figure intelligence through expanded bilateral channels; migration-flow management through the resumed Remain in Mexico framework adapted to the post-Title-42 conditions; Mexican commitment to invest in northern-border infrastructure under the Plan México framework; and the establishment of a continuing bilateral-coordination mechanism through scheduled cabinet-level meetings.

The framework's operational architecture is structured around three principal coordination channels. First, the Ebrard SE — Trump-USTR Greer trade channel, addressing the tariff-and-trade-policy dimension. Second, the de la Fuente SRE — Rubio State Department diplomatic channel, addressing the broader bilateral-political-and-strategic dimension. Third, the Harfuch SSPC — Bondi DOJ and DEA enforcement channel, addressing the security-cooperation and cartel-enforcement dimension. The three channels operate in coordination through Sheinbaum's principal staff and through the bilateral coordination meetings.

The framework did not resolve the tariff regime fully. Sectoral tariffs on Mexican steel, aluminum, and certain agricultural products remained in effect as of mid-2025, and the IEEPA-tariff residual structure remained available as a continuing leverage instrument. The Mexican government's operational posture across the post-May 2025 period has been to continue the operational-security tempo (continuing Operativo Frontera Norte, continuing laboratory seizures, additional transfers as warranted) while pursuing diplomatic-and-trade-policy negotiation across the three coordination channels. The Trump-2 administration's posture has been to preserve the continuing-leverage-and-conditional-de-escalation framework while observing operational-results delivery.

The framework's principal contribution has been the establishment of a stable operational-working architecture under conditions of continuing structural strain. The bilateral relationship is not in a stable diplomatic-and-trade equilibrium of the 2019–2024 type; it is in a continuing operational-cooperation-under-pressure mode that the May 2025 framework has stabilised but not resolved. The forward trajectory through the USMCA 2026 review window will principally test whether this architecture is sustainable through additional shocks or whether further escalation will require additional operational concessions.

14. The Three-Account Assessment — Morena Republican-Sovereignty, Opposition Hawk-Critique, and Structural State-Cartel-Symbiosis Reading

The early Sheinbaum security trajectory is structured by three competing interpretive accounts that this document maintains as marked unresolved through the corpus discipline of three-account-presentation rather than account-adjudication.

The first account is the Morena republican-sovereignty account, advanced principally by the Sheinbaum government communications (Sheinbaum's mañaneras, Harfuch's Martes de Seguridad, Ebrard's and de la Fuente's diplomatic communications), by Morena-aligned commentary (La Jornada, John Ackerman, Pedro Miguel, Viridiana Ríos in some columns), and by elements of the post-2018 progressive intellectual coalition. The account's principal significant claims: that the Sheinbaum government has successfully managed the most acute bilateral security-and-trade shock to Mexico since at least the 1970s through a measured, sovereignty-preserving, results-oriented posture; that the Harfuch operational pivot has delivered notable operational results without abandoning the AMLO-era atender las causas doctrinal frame; that the Guardia Nacional SEDENA incorporation rationalises an operational reality and embeds it in a more institutionally-disciplined framework; that the 27 February 2025 transfers and the Operativo Frontera Norte deployment demonstrate Mexico as a sovereign partner that cooperates from strength rather than capitulates from weakness; and that the post-May 2025 working architecture is the operational achievement of the early sexenio security policy. The account's principal evidence: the operational tempo of seizures and transfers; the de-escalation of the worst tariff scenario; the absence of US military or paramilitary action on Mexican soil despite Trump-administration-figure threats; and the absence of any acute political crisis comparable to the 2014 Ayotzinapa or the 2019 Culiacanazo.

The second account is the opposition-and-US-security-hawk critique, advanced principally by Mexican opposition figures (PAN, PRI, MC), by Mexican right-of-centre commentary (Reforma editorial line, Castañeda, Dresser, Bravo Regidor in some columns), by US security-policy commentary (Ryan Berg at CSIS, Vanda Felbab-Brown at Brookings, Earl Anthony Wayne, Roberta Jacobson in some columns), and by US conservative-policy commentary that has welcomed the FTO designation and the cartel-enforcement frame. The account's principal considerable claims: that the Sheinbaum response to the Trump-2 pressure has been operationally meaningful but doctrinally insufficient; that the FTO designation should have been welcomed rather than resisted because of the material-support legal leverage it provides against the cartel-state-economic nexus; that the Guardia Nacional SEDENA incorporation completes the militarisation of Mexican public security without delivering measurable rule-of-law gains; that the post-El-Mayo Sinaloa civil war demonstrates the structural failure of any cartel-management strategy that relies on tacit-state-and-cartel equilibria; that the 27 February 2025 traslado mechanism erodes the rule-of-law institutional framework; and that the post-May 2025 working architecture preserves the cartel-political-economy structure rather than dismantling it. The account's principal evidence: the cumulative homicide and disappearance figures across the early sexenio remaining elevated; the Sinaloa civil war's continuing intensity; the absence of strategic-economic-disengagement from the cartel-political-economy in regions of acute conflict; and the absence of material criminal-justice-reform that would address impunity rates above 90 per cent for serious crimes.

The third account is the structural state-cartel-symbiosis reading, advanced principally by academic-research commentary (Carlos Pérez Ricart, Falko Ernst at International Crisis Group, Luis Astorga, Guillermo Valdés Castellanos, Eduardo Guerrero of Lantia, Alejandro Madrazo Lajous at CIDE), by some investigative-journalism commentary (the Animal Político investigative team, the RIODOCE team, Anabel Hernández with the caveats noted earlier), and by WOLA Mexico Monitor analysis. The account's principal marked claims: that the regional-governance reality across significant parts of Mexico — particularly Sinaloa, parts of Guerrero, Michoacán, Tamaulipas, Zacatecas, parts of Veracruz and Chiapas — is a state-cartel symbiosis in which formal state institutions (municipal police, state authorities, federal-agency local offices), organised-crime groups, local political actors (mayors, state legislators, some federal-deputy local networks), and licit-economic interests (agricultural-producer associations, transport-sector associations, local-construction-and-real-estate interests, some financial-institution local branches) are entangled in operational governance arrangements that function as the actual regional governance regardless of which doctrinal framework is articulated at the federal-political level; that the Sinaloa civil war is the visible eruption of this underlying structure rather than its anomaly, produced by the disruption of the Mayos-Chapitos federated arrangement that had been a particular regional-equilibrium configuration; that no single doctrinal pivot — AMLO's abrazos, Sheinbaum-Harfuch's inteligencia técnica, Calderón's Drug War, hypothetical US-led FTO-frame enforcement — can dissolve this structure because the structure is composed of multiple actors with sustained incentive to participate in it; and that the bilateral-security framework will continue to oscillate between doctrinal pivots without addressing the structural conditions. The account's principal evidence: the cross-decade persistence of regional-governance arrangements across multiple sexenios; the multi-actor character of the arrangements documented in academic and investigative work; the limited operational consequence of high-profile capture-and-extradition operations on regional-governance reality; and the Mayos-Chapitos fracture as the predictable consequence of the operational disruption of one regional-equilibrium configuration.

The three accounts are not formally adjudicated within this document. The Morena account is best evidenced by the operational-results and absence-of-acute-crisis dimension; the opposition account is best evidenced by the cumulative-violence and structural-impunity dimension; and the structural-reading account is best evidenced by the cross-decade persistence and multi-actor-arrangement dimension. The forward trajectory through 2025–2026 and the eventual evaluation of the early Sheinbaum security policy will require accumulation of additional operational data, structural analysis, and historical-perspective evaluation that the corpus discipline reserves for subsequent waves.

15. Conclusion — Forward View on Cartel-State-Sovereignty Dynamics in the Early Sheinbaum Sexenio

The early Sheinbaum security trajectory documented in this anchor occupies a structurally distinctive position in the post-2000 Mexican governance arc. It is the first post-AMLO security configuration; the first Mexican security configuration to operate under a US administration that has designated Mexican cartels as Foreign Terrorist Organizations and has imposed IEEPA tariffs on Mexican commerce citing fentanyl and migration; the first Mexican security configuration to operate under the constitutional incorporation of the Guardia Nacional into SEDENA; and the first to operate under a Mexican President with measurable scientific-and-academic professional background as part of a technocratic-leaning cabinet. The configuration has produced an operational tempo notable elevated relative to the AMLO baseline, a bilateral cooperation framework considerable more transactional and conditional than the post-2008 Mérida-Initiative-era baseline, and a domestic political-constitutional configuration meaningful more centralised in executive-and-Morena-political authority than the post-1997 democratic-transition baseline.

The forward trajectory through 2025–2026 is conditional on three principal variables. First, the stability of the May 2025 cooperation framework through the USMCA 2026 review window. The review process — formally initiated under USMCA Article 34.7 for the joint review six years after entry into force, with the principal date being July 2026 — will principally test whether the bilateral can transition from the current operational-cooperation-under-pressure mode to a stable trade-and-security architecture, or whether the USMCA review will introduce additional structural shocks. Second, the trajectory of the Sinaloa civil war through 2025–2026. The conflict's resolution into a renewed-equilibrium configuration (with either faction predominant, or a stable territorial division), continuation at high intensity with continuing civilian cost, or expansion into broader inter-cartel realignment will principally test the structural-reading account's predictive claim. Third, the political-constitutional consequences of the FTO regime and the 27 February 2025 traslado precedent. Whether the Mexican constitutional-political system absorbs these as one-off bilateral-cooperation instruments, or establishes them as precedents for subsequent administrations and subsequent shocks, will principally test the opposition account's institutional-erosion claim.

The principal corpus-relevant assessment, maintained with the three-account discipline, is that the early Sheinbaum security trajectory has stabilised an operational-cooperation working architecture under conditions of acute bilateral pressure and acute domestic-regional crisis (the Sinaloa civil war), but has not resolved the structural-conditions question that all three accounts in their different ways identify. The post-2025 trajectory will principally test whether the operational-working architecture is sustainable through additional pressure and whether the structural-conditions question can be addressed through any combination of doctrinal pivot, institutional reform, and bilateral-cooperation framework. The principal spiral-index successors to this document — MX-D-02 (the operational-programme anchor), MX-D-04 (the judicial-reform implementation), MX-F-01 (the bilateral architecture), MX-J-01 (the state-cartel-nexus precedent at Ayotzinapa), and the forthcoming MX-O-01 (the cartel-and-security trajectory mega-trend) — will accumulate the additional documentation that the forward-trajectory assessment will require.

The document closes with the recognition that the security-policy question is the structurally distinctive feature of Mexican governance in the post-2006 period, that the three contested-record accounts of the early Sheinbaum trajectory remain material unresolved, and that the forward trajectory will principally be tested by the USMCA 2026 review window, the Sinaloa civil war's resolution, and the institutional-consequences trajectory of the FTO regime and the traslado precedent. The Sheinbaum security pivot, the Sinaloa Cartel civil war, and the Trump-2 tariff-fentanyl linkage constitute, together, the principal early-sexenio security-and-bilateral inflection point that the corpus will revisit as subsequent evidence accumulates.

Sources

Secretaría de Seguridad y Protección Ciudadana (SSPC), Conferencias de Prensa Vespertinas y Matutinas del Secretario Omar García Harfuch, October 2024 – May 2025; Informe Semanal de Seguridad press conferences (the Martes de Seguridad sequence, continued from the AMLO administration but operationally restructured under García Harfuch).
Sheinbaum Pardo, Claudia, Estrategia Nacional de Seguridad 2024–2030, presentation 8 October 2024; Plan Integral para la Atención de la Violencia en Sinaloa, announced October 2024.
SSPC, Comunicados sobre Operativo Frontera Norte y Despliegue de Guardia Nacional, February 2025 onward.
Secretaría de la Defensa Nacional (SEDENA), Informes sobre Aseguramientos de Drogas Sintéticas y Desmantelamiento de Laboratorios, October 2024 – May 2025.
Fiscalía General de la República (FGR), Comunicados sobre Entregas de Personas Sujetas a Procesos en Estados Unidos, 27 February 2025; Acuerdos sobre Cooperación Bilateral.
Gabinete de Seguridad de la Presidencia de la República (the daily 6:00am security cabinet, continued from the AMLO administration), Versiones Estenográficas, October 2024 – May 2025.
United States Department of State, Designation of International Cartels and Other Organizations as Foreign Terrorist Organizations and Specially Designated Global Terrorists, Federal Register notice 20 February 2025 (designating Sinaloa Cartel, Cártel de Jalisco Nueva Generación (CJNG), Cártel del Noreste, La Nueva Familia Michoacana, Cártel del Golfo, and Cárteles Unidos).
United States Government, Executive Order 14157 (Designating Cartels and Other Organizations as Foreign Terrorist Organizations and Specially Designated Global Terrorists), 20 January 2025; Executive Order 14195 (Imposing Duties to Address the Situation at Our Southern Border), 1 February 2025.
United States Drug Enforcement Administration (DEA), 2024 National Drug Threat Assessment; Press Releases on Fentanyl Precursor and Laboratory Seizures, October 2024 – May 2025.
United States Department of Justice (DOJ), Indictments and Plea Agreements relating to Ismael Zambada García, Joaquín Guzmán López, and Related Defendants, Eastern District of New York, July 2024 onward.
Decreto por el que se reforman, adicionan y derogan diversas disposiciones de la Constitución Política de los Estados Unidos Mexicanos, en materia de Guardia Nacional, Diario Oficial de la Federación, 30 September 2024 (constitutional incorporation of Guardia Nacional into SEDENA).
INEGI, Estadísticas Vitales — Defunciones por Homicidio, monthly releases October 2024 – April 2025; Encuesta Nacional de Victimización y Percepción sobre Seguridad Pública (ENVIPE) 2024 results.
Reforma, El Universal, Milenio, La Jornada, archive coverage of the Sinaloa civil war, the El Paso airport apprehension, the FTO designation, the tariff confrontation, and the security-policy pivot (2024–2025).
Animal Político, Aristegui Noticias, Proceso, investigative reporting on the security trajectory (2024–2025); the Heriberto Paredes, Pablo Ferri, and Carlos Pérez Ricart reporting and analysis sequences.
RIODOCE (Culiacán), Noroeste, El Sol de Sinaloa, ground-level reporting on the Sinaloa civil war (September 2024 – May 2025), including casualty tracking and displacement reporting [TBD-VERIFY: precise casualty figures and time series].
El País México bureau, archive coverage (2024–2025); Elías Camhaji and Beatriz Guillén reporting.
Insight Crime, Sinaloa Cartel Profile, CJNG Profile, Cartel del Noreste Profile; analysis of the post-July 2024 Sinaloa fracture and the cross-cartel competitive dynamics (2024–2025).
WOLA (Washington Office on Latin America), Mexico Security Monitor; analysis of the AMLO-to-Sheinbaum security-doctrine transition and the FTO-designation implications (2024–2025).
Brookings Institution Mexico Initiative (Vanda Felbab-Brown, Diana Negroponte, Earl Anthony Wayne), policy briefs on the Sheinbaum security trajectory and the Trump-2 confrontation (2024–2025).
CSIS Americas Program (Ryan C. Berg), analysis of the cartel-FTO designation, the tariff-fentanyl linkage, and the bilateral security architecture (2024–2025).
International Crisis Group, Mexico's Everyday War: Guerrero and the Trials of Peace; updated commentary on Sinaloa civil war (2024–2025).
Lantia Consultores (Eduardo Guerrero Gutiérrez), monthly violence-trajectory analyses; Mexico Peace Index (Institute for Economics and Peace) 2024 and 2025 editions [TBD-VERIFY: precise IEP and Lantia methodologies and figures].
Hope, Alejandro, El Universal and La Silla Rota columns (until his April 2024 death; archival reference only); Pérez Ricart, Carlos A., academic and Nexos commentary on cartel-state dynamics (2024–2025).
Castañeda, Jorge G., Foreign Affairs and Reforma columns (October 2024 – May 2025) on the bilateral and the FTO-designation issue.
Dresser, Denise, columns in Reforma and Proceso (October 2024 – May 2025) on the security-doctrine pivot and the sovereignty-question.
Astorga, Luis, El siglo de las drogas (revised editions); Valdés Castellanos, Guillermo, Historia del narcotráfico en México; foundational Spanish-language scholarship on the Sinaloa Cartel.
Hernández, Anabel, investigative books and Deutsche Welle columns on the Sinaloa Cartel and state-cartel networks (2024–2025; treat single-source claims with caution per Singapore-corpus discipline).
Council on Foreign Relations and Wilson Center Mexico Institute briefings and webinars (October 2024 – May 2025).
Reuters Mexico, Associated Press, The New York Times, The Washington Post, Bloomberg archive coverage of the El Paso airport apprehension, the FTO designation, the 27 February extraditions, and the tariff confrontation (2024–2025).

MX-A-02: Calderón Presidency (2006–2012) — Drug War launch and proximate doctrinal antecedent
MX-A-03: Peña Nieto Presidency (2012–2018) — kingpin strategy and Chapo's third arrest
MX-B-03: 2014 Ayotzinapa Procedural Investigation — state-organised-crime nexus precedent
MX-C-01: 2018 AMLO Landslide and Morena's Founding Win (electoral mandate antecedent)
MX-C-02: Cuarta Transformación (4T) Programme — AMLO Presidency 2018–2024 (the abrazos no balazos doctrinal antecedent)
MX-D-01: 2024 Sheinbaum Landslide and Morena Supermajority (electoral mandate)
MX-D-02: The Sheinbaum Government — Continuity, Departure, and the Trump-2 Confrontation (2024–2025) (sister doc, the operational-programme anchor)
MX-D-04: Implementation of the 2024 Judicial Reform (Judge Elections June 2025) — sister doc
MX-F-01: Mexico–US Bilateral (2000–present) — bilateral architecture
MX-J-01: Ayotzinapa 43 Contested Record — state-cartel nexus
MX-K-01: 1994 Tequila Crisis Zedillo Reforms (deep antecedent for bilateral architecture)
MX-R-01: Mexico Governance Books Canon
MX-E-01: US–Mexico Migration Cooperation: From Remain in Mexico to CBP One to Plan Frontera Norte (2018–2025)
MX-D-05: Sheinbaum Year Two: USMCA 2026 Review and Economic Recalibration (2025-2026)
MX-E-02: US-Mexico Trump-2 tariff confrontation 2025-2026
MX-B-04: back-reference added by symmetry sweep
MX-J-02: The Mexican Drug War — Cartel Evolution, Militarisation, and the Security Debate
MX-H-PRES-02: Felipe Calderón Hinojosa — A Biography
MX-H-PRES-03: Enrique Peña Nieto — A Biography
MX-H-PRES-05: Claudia Sheinbaum Pardo — A Biography
MX-H-PRES-06: Carlos Salinas de Gortari — A Biography
MX-D-06: Sheinbaum Year Two — USMCA Review, Cartel-FTO Confrontation, Migration Management, and the 2027 Mid-Term Trajectory
MX-I-02: The Mexican Armed Forces and the Militarisation of Public Life
MX-O-01: Mexico Megatrends — The 2030s Questions