Congress of the Union

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Congress of the Union
Congreso de la Unión
LXII Legislature
Seal of the Congress
Type Bicameral
Houses Senate
Chamber of Deputies
Founded September 28, 1821 (1821-09-28)
President of the
Raúl Cervantes, (PRI)
Since September 1, 2013 (2013-09-01)
President of the
Chamber of Deputies
Ricardo Anaya, (PAN)
Since September 1, 2013 (2013-09-01)
Seats 628
(128 Senators)
(500 Deputies)
Senate political groups      PAN Party (Mexico).svg      PRI Party (Mexico).svg
     PRD Party (Mexico).svg      PVE Party (Mexico).svg
     PMC Party (Mexico).svg      PT Party (Mexico).svg
     PNA Party (Mexico).svg
Chamber of Deputies political groups      PAN Party (Mexico).svg      PRI Party (Mexico).svg
     PRD Party (Mexico).svg      PVE Party (Mexico).svg
     PMC Party (Mexico).svg      PT Party (Mexico).svg
     PNA Party (Mexico).svg
Authority Title III, Chapter II of the
Political Constitution of
the United Mexican States
Senate last election July 1, 2012
Chamber of Deputies last election July 1, 2012
La Patria Es Primero
(The Country Is First)
Meeting place
Palacio del Senado
Mexico City
Meeting place
Palacio Legislativo de San Lázaro
Mexico City
Senate Website
Chamber of Deputies Website

The Congress of the Union (formally Congreso General de los Estados Unidos Mexicanos; English: General Congress of the United Mexican States) is the legislative branch of the Mexican government.


The Congress is a bicameral assembly, consisting of two chambers: the Chamber of Deputies, and the Senate. Its structure and responsibilities are defined in the Third Title, Second Chapter, Articles 50 to 79 of the 1917 Constitution.

The upper chamber is the Senate "Cámara de Senadores" or "Senado". It comprises 128 seats, 96 members are elected by direct popular vote for six-year terms; the other 32 seats are allocated based on proportional representation.

The lower house is the Chamber of Deputies "Cámara de Diputados". It has 500 seats, 300 members are elected by popular vote to three-year terms; the other 200 seats are allocated according to proportional representation.

In keeping with the Mexican tradition of "no reelection," deputies and senators are not eligible to immediately succeed themselves. Thus, the Congress is one of the few democratically elected legislatures in the world that is completely renewed at each election.

Permanent Committee[edit]

The "Comisión Permanente del Congreso de la Unión", translated variously as the Permanent Committee or Standing Committee, is a body of 19 deputies and 18 senators that is responsible for tasks relating to the Congress when it is in recess.


It is conventional to refer to each Legislature by the Roman numeral of its term. Thus, the current Congress (whose term lasts from 2012 to 2015) is known as the "LXII Legislature"; the previous Congress (whose term lasted from 2009 to 2012) was the "LXI Legislature," and so forth. The I Legislature of Congress was the first Constitutional congress after the 1857 Constitution.

Early in the 20th century, the revolutionary leader Francisco I. Madero popularized the slogan, Sufragio Efectivo – no Reelección (effective suffrage, no reelection). In keeping with that long held principle, the current 1917 Constitution states that "Deputies and Senators cannot be reelected for the next immediate term."[1]

See also[edit]


  1. ^ Constitution of 1917, article 50, 59.

External links[edit]