US activists and politicians signalized various complaints regarding Mexican workplace abuses related to labour standards practiced in the south of the border enshrined in the United States-Mexico-Canada Agreement (USMCA). U.S. unions filed the first labor rights petition against Mexico under the new regional trade pact, intending to bring an objection against Tridonex factories in Matamoros, stating that it has denied workers the right to independent representation. US legislators also pressured Mexican authorities to order the General Motors (GM) Co union in the city of Silao to repeat a worker vote, alleging that abuses, such as the destruction of some ballots and the refusal to give labour inspectors documentation of the vote tally, happened and that it violates USMCA determinations. The Mexican government, in turn, sent a letter to the US government to propose a space for cooperation, also in the framework of the USMCA, suggesting an investigation into the enforcement of labour rights of migrant workers in the agricultural sector in the country, but denied that these concerns are related to the complaints about Tridonex and General Motors. The letter is, in part, a follow-up to the first labour complaint filed by Mexican women under the USMCA. Jornaleras, accompanied by social organisations, asked the Ministry of Labour and Social Security (STPS) to initiate a labour complaint against the US government and their demands were included in the diplomatic letter sent to the US Secretary of Labour.