The LXV Legislature of the Congress of the Union (65th Congress) was a meeting of the legislative branch of Mexico, composed of the Chamber of Deputies and the Senate of the Republic. It convened on 1 September 2021, and ended on 31 August 2024, during the final three years of President Andrés Manuel López Obrador's presidency.
The Chamber of Deputies was elected in the 2021 legislative election, in which Juntos Hacemos Historia, consisting of the National Regeneration Movement (Morena), the Labor Party (PT), and the Ecologist Green Party of Mexico (PVEM), kept their majority but did not reach the two-thirds supermajority required to pass López Obrador's proposed constitutional reforms.[1] This legislature was notable for being the first where deputies were eligible for reelection,[2] with 129 out of the 500 seats being filled by returning deputies.[3]
Composition
These tables relate to the composition of the Senate of the Republic and the Chamber of Deputies at the start of the LXV Legislature and present day and summarises the changes in party affilation that took place during the congress.
In the list, the first two senators represent those who won a majority in the state, with the first referring to the first formula and the second to the second formula. The third corresponds to the senator who secured a seat through first minority.
^ abIn Coahuila: Armando Guadiana Tijerina took a leave of absence due to his declining health. His alternate, Reyes Flores Hurtado, took his place in the Senate. After Guadiana's death on December 26, 2023, Flores completed the remainder of the term.
^In Puebla: Jesús Encinas Meneses, who had served as an alternate senator for Morena in 2019, became an independent the same day he returned to the Senate.
^In Puebla: Nancy de la Sierra Arámburo became an independent on September 28, 2021 to form the Grupo Plural parliamentary group. She joined the Institutional Revolutionary Party on October 3, 2023, before switching back to independent on July 18, 2024 due to her disagreements with Alejandro Moreno's possible reelection as party president.
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