Mexico's Congress (Congreso de la Unión) opened on September 1, 2026 the third and final year of the LXVI Legislature, the prelude to the 2027 midterm elections. According to Expansión Política, the electoral process formally begins on September 10, with control of the Chamber of Deputies and the replacement of 17 governorships at stake.
This is the final stretch of a legislature that will hold sessions in parallel with the campaign leading up to 2027. El Financiero reported that the year will be shaped by the 2027 elections and a legislative agenda that includes, among other matters, a reform to prohibit dual nationality in governors. For the Mexican community in the United States and Canada, where dual nationality is a common condition, the debate is being followed closely because it affects those who hold a second citizenship and aspire to elected office in Mexico. Whatever is approved in this final period will also leave rules in effect beyond the 2027 elections, making the closing agenda a long-term matter for the country.
Expansión Política reports that the Chamber of Deputies carries a backlog of more than 6,000 pending matters, including initiatives and proposed resolutions awaiting committee review. The same source notes that 95% of presidential proposals advance while only 4% of legislators' proposals do, a gap that reflects the weight of the executive's agenda. At the opening session, the source adds, that agenda was overshadowed by the electoral atmosphere: the priorities that the legislative blocs had outlined in their plenary meetings fell by the wayside, and a pact among the floor leaders prevented tensions from escalating. The next milestone on the political calendar, also according to Expansión Política, is March 2027, when campaigns will formally begin.
The electoral contest and legislative work will share the calendar over the coming months. The progress of reforms such as the dual-nationality ban will set the tone for how the LXVI Legislature closes and how the race for the next Chamber of Deputies, which will be renewed in the 2027 elections, gets underway.
This article was drafted with artificial intelligence assistance based on verified sources and reviewed by a human editor before publication.