Senate of the Republic (Mexico)

For other uses, see Senate of the Republic.
Senate of the Republic
Senado de la República
LXII Legislature
Seal of the Senate
Founded October 4, 1824 (1824-10-04)
Pablo Escudero Morales (PVEM)
Since September 1, 2016 (2016-09-01)
Seats 128 members
(1 vacant)
Political groups
Length of term
6 years
Authority Chapter II of the Constitution of the United Mexican States
Direct election
Last election
July 1, 2012

La Patria Es Primero

(The Country Is First)

Meeting place
Senate Tribune
Senate Palace
Mexico City
Official Website of the Mexican Senate

The Senate of the Republic, (Spanish: Senado de la República) constitutionally Chamber of Senators of the Honorable Congress of the Union (Spanish: Cámara de Senadores del H. Congreso de la Unión), is the upper house of Mexico's bicameral Congress.

After a series of reforms during the 1990s, it is now made up of 128 senators:[1]

In a senatorial race, each party nominates two candidates who run and are elected together by direct vote. The party of the two candidates that won the second highest vote within the state or the Federal District then assigns a senator to occupy the third seat (first minority seat), according to the list of candidates that the party registered with the Federal Electoral Institute (IFE).

Senators serve six-year terms, running concurrently with the President of Mexico. Special elections are rare, as substitutes are chosen at every election.

The Senate is completely renewed every six years, since senators are barred from immediate reelection. This will change at the 2018 election.

Term and current composition

See main article: LXII Legislature of the Mexican Congress

In Spanish, it is conventional to refer to each Legislature of the Senate by the Roman numeral of its term.

The current session (whose term lasts from 2012 to 2015) is known as the LXII Legislatura (62nd Legislature).

Senators are elected to serve during two legislatures of the Mexican Chamber of Deputies. Thus, current Senators (who were elected in the general election of July 1, 2012) will serve during the 62nd and 63rd Legislatures of the Chamber of Deputies.

Election of Senators

Eligibility requirements

According to the Constitution, senators are the representatives of the nation. To be a senator, for any of the two principles of choice, you must meet the following requirements:[2]

Election process

Senators are elected for a period of six years, corresponding to two legislatures and can not be reelected for the immediate period, although alternately.

They are elected by direct popular suffrage and secret ballot in every state of the republic. Each political party registers a list with two formulas of candidates, consisting of two owners and their alternates: the number 1 of the formula First Formula is denominated to him, and 2, Second Formula. The formula of candidates obtaining the highest number of votes is elected complete, becoming the first two senators of the entity; the third senate is awarded to the candidate of First Formula of the political party that won second place of votes or first minority.

They are also 32 senators elected by proportional representation. For this election each political party registers a list of 32 candidates, and these are allocated by proportional representation according to the number of votes obtained by each political party in the national election.

Governing bodies

For their internal government has two main instances, namely:

LXII Legislature

The integration of the governing bodies in the LXII Legislature has been as follows:


For the office of legislative affairs Senators integrate in Commissions that are dedicated to a particular issue. The most important committees are those of: Interior, Constitutional Issues, Defense, Finance, Justice, among others. Each Senator belongs to at least three different commissions, and each committee shall elect a Chairman and two Secretaries 5 (according to the Commission) to coordinate their work.


A senator holds office for a period of six years for which he was elected (from September 1 of the year of his election to the 31 August six years later), divided into two legislatures of three years each.

From 1 September 2015 is installed LXIII Legislature, which will end his term on 31 August 2018. Senators were elected to office in the 2012 elections for a period of six years and are at their posts from 1 September of that year, therefore they will hold office from the LXII Legislature to LXIII Legislature.


The two chambers of the General Congress divided its exercise in two ordinary sessions, the first from September 1 to December 15 and the second from February 1 to April 30, it should be required may convene special sessions to dispatch urgent or pertinent matters.

The time between the regular sessions known as Recesses. There are two recesses that run from December 16 to January 31 and May 1 to August 31. During breaks, the Permanent Commission of the Congress is installed and serves as depository of the legislature; It is composed of 37 members, of which 19 Deputies and 18 Senators are appointed by their respective chambers the day before the closing of the regular sessions.

The sessions of the Standing Committee are held in the Senate during the first recess and the House of Representatives in the second recess.


Among the most important functions of the Senate it is to ratify or reject the president 's proposals regarding:[4]

See also


Coordinates: 19°26′11.57″N 99°8′19.37″W / 19.4365472°N 99.1387139°W / 19.4365472; -99.1387139

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