The request from Washington to detain and extradite ten Mexican officials, including the governor of Sinaloa, Rubén Rocha Moya, has triggered the most serious rupture in bilateral relations since the Trump administration took office. The United States Department of Justice alleges that Rocha and his associates protected the Chapitos faction of the Sinaloa cartel in exchange for political and financial support. But the Fiscalía General de la República (FGR) in Mexico City has flatly refused to proceed, demanding that Washington supply the evidentiary basis for the claims before any provisional arrest can be executed. Viewed from Mexico City, the refusal is framed not as a defence of Rocha but as a matter of legal procedure and national sovereignty. President Claudia Sheinbaum, speaking from Palenque in Chiapas, declared that “no foreign government can enter our territory” and warned that any such attempt would meet the “dignity of the Mexican people.” On the same day, she inaugurated an ecopark near the former residence of her predecessor, Andrés Manuel López Obrador, reinforcing the continuity of the Morena project in a region where its base remains strong.

The accusations have landed with particular force in Sinaloa, where Rocha requested a temporary leave of absence on the evening of 1 May, insisting he had a clear conscience and that the allegations were false. His departure came after a senator from his own party, Guadalupe Chavira de la Rosa, urged him to step aside to allow an unimpeded investigation. The state congress is expected to name a substitute governor. The mayor of Culiacán, Juan de Dios Gámez, also sought leave, replaced by the sindic procurador Ana Miriam Ramos Villarreal. These resignations do not strip the officials of their constitutional immunity — the fuero — which requires a lengthy congressional process for removal, a fact that analysts in London note could stall any extradition proceedings for months. The Partido Acción Nacional has called for the dissolution of state powers in Sinaloa, arguing that the government is too compromised to restore order after a year of cartel violence. Washington’s indictment, meanwhile, has deepened internal tensions within Morena between those who see the charges as a political vendetta and those who fear a rupture with the United States will damage trade under the T-MEC, investment flows, and energy cooperation. The coming weeks will test whether Sheinbaum’s administration can sustain its defence of sovereignty while ensuring that credible allegations of state collusion with narcotrafficking are not buried beneath the banner of national pride.