The surrender of two former senior officials from Mexico’s Sinaloa state to United States authorities has prompted President Claudia Sheinbaum to categorically dismiss any risk to her government, even as the episode deepens scrutiny of the ruling Morena party’s ties to organised crime. Gerardo Mérida Sánchez, the state’s former security secretary, crossed into Arizona last week and was taken into custody by US marshals, while Sinaloa’s former finance secretary, Enrique Díaz Vega, surrendered in New York. Both men are among 10 officials, including the sitting governor Rubén Rocha Moya, charged in a US indictment alleging they aided the Sinaloa cartel in the massive importation of illicit drugs. Sheinbaum, in her morning press conference, asserted that the decision to surrender was theirs alone, and that her administration had “nothing to hide”.

Viewed from Washington, the episode amplifies pressure on Sheinbaum’s administration, barely months old, to demonstrate a tougher line on corruption and narcotics. The charges, unsealed last month, are the latest in a series of US legal actions targeting Mexican officials, and come as bilateral relations are strained over security cooperation and migration. Sheinbaum sought to deflect the political fallout by accusing those spreading allegations of “narcogovernment” and “narcoparty” of belonging to the “plumas del viejo régimen” – the pens of the old regime. She specifically named critics linked to the administrations of Carlos Salinas de Gortari and Felipe Calderón, and in a pointed question asked: “which criminal pact?”. The remarks underscore a strategy of delegitimising her accusers by painting them as relics of a past widely reviled in Mexico.

Analysts in Mexico City note that while Sheinbaum may be confident the legal proceedings will not reach her directly, the risk is more political than judicial. The Morena party has been accused by some US figures of having links to drug cartels, and Sheinbaum was forced to dismiss the possibility that Washington might label it a terrorist organisation – a prospect she described as “no risk”. However, with the US Department of Homeland Security chief due to visit Mexico imminently, the Sheinbaum government must navigate a delicate diplomatic balance: avoiding the appearance of complicity while preserving the nationalist rhetoric that defines her predecessor’s legacy. The coming weeks will reveal whether her dismissive tone can withstand the weight of US judicial and political scrutiny.