LXIV Legislature of the Mexican Congress

The LXIV Legislature of the Congress of the Union, the 64th session of the Congress of Mexico, convened on 1 September 2018 and ended on 31 August 2021. It was composed of the 500 federal deputies and 128 senators elected in the 2018 Mexican general election. While the deputies served only in the 64th Congress, the senators, elected to six-year terms, also formed the Senate in the 65th Congress, which convened in 2021.

Highlights

The 64th Congress was noteworthy for its gender parity, with the most women ever elected to the Chamber of Deputies and Senate. Women held 49 percent of the seats in the Senate, a national record and the third-highest percentage of women in a current national upper house, according to data collected by the Interparliamentary Union. The Chamber of Deputies had the fourth-highest percentage of women among lower houses. In the Chamber of Deputies, this was the first election to be conducted after a 2017 redistricting of the federal electoral districts conducted by the National Electoral Institute (INE). In reapportionment, Mexico City lost three seats, while seven states added a seat and four states lost one seat each. On 23 August the PRI, PRD, PAN and Movimiento Ciudadano announced they would challenge the allocation of proportional representation seats in the Chamber of Deputies, saying MORENA was overrepresented.

Composition

Senate

Chamber of Deputies

Leadership

Senate

Presiding

Martí Batres Guadarrama (MRN), 2018–2019
Mónica Fernández Balboa (MRN), 2019–2020
Óscar Eduardo Ramírez Aguilar (MRN), 2020–2021

Party Leadership

PAN Leader: Damián Zepeda Vidales, 2018
- Rafael Moreno Valle Rosas, 2018
  - Mauricio Kuri González, from 2018
PRI Leader: Miguel Ángel Osorio Chong
PRD Leader: Miguel Ángel Mancera
PT Leader: Alejandro González Yáñez, until 2019
- Geovanna Bañuelos de la Torre, from 2019
PVEM Leader: Manuel Velasco Coello, 2018
- Raúl Bolaños Cacho Cué, from 2018
MC Leader: Dante Delgado Rannauro
MRN Leader: Ricardo Monreal Ávila
PES Leader: Sasil de León Villard

Chamber of Deputies

Presiding

Porfirio Muñoz Ledo (MRN), 2018–2019
Laura Rojas Hernández (PAN), 2019–2020
Dulce María Sauri Riancho (PRI), 2020–2021

Party leadership

PAN Leader: Juan Carlos Romero Hicks
PRI Leader: René Juárez Cisneros
PRD Leader: Ricardo Gallardo Cardona, until 2019
- Verónica Juárez Piña, from 2019
PT Leader: Reginaldo Sandoval Flores
PVEM Leader: Arturo Escobar y Vega
MC Leader: Alberto Esquer Gutiérrez, 2018
- Itzcóatl Tonatiuh Bravo Padilla, 2018–2021
  - Fabiola Loya Hernández, from 2021
MRN Leader: Mario Martin Delgado, until 2020
- Ignacio Mier Velazco, from 2020
PES Leader: Fernando Manzanilla Prieto, until 2019
- Olga Juliana Elizondo Guerra, 2019
  - Jorge Argüelles Victorero, from 2019

Membership

Senate

The Senate is composed of 128 seats; three each elected from each of Mexico's 32 federative entities for a total of 96, as well as 32 proportional representation seats.

Elected by state

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.

Elected by proportional representation

Chamber of Deputies

The Chamber of Deputies is composed of 500 seats, elected from 300 single-member federal electoral districts and 40 apiece from five proportional representation electoral regions.