Legislative elections were held in

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

on 22 October 2017 to elect half of the

Chamber of Deputies The chamber of deputies is the lower house in many bicameral legislatures and the sole house in some unicameral legislatures. Description Historically, French Chamber of Deputies was the lower house of the French Parliament during the Bourb ...

and one third of the

Senate A senate is a deliberative assembly, often the upper house or chamber of a bicameral legislature. The name comes from the ancient Roman Senate (Latin: ''Senatus''), so-called as an assembly of the senior (Latin: ''senex'' meaning "the el ...

. The result was a victory for the ruling

Cambiemos (JxC, ) was a political coalition in Argentina. A liberal coalition, it was created in 2015 as Cambiemos (), and renamed in 2019. It was composed of Republican Proposal, Radical Civic Union, Civic Coalition ARI and United Republicans. These ...

alliance, being the most voted force in 13 of the 24 districts.

Background

The elections took place during the presidency of

Mauricio Macri Mauricio Macri (; born 8 February 1959) is an Argentine businessman and politician who served as President of Argentina from 2015 to 2019. He has been the leader of the Republican Proposal (PRO) party since its founding in 2005. He previously ...

whose ''

'' coalition also governed the

City of Buenos Aires Buenos Aires, controlled by the government of the Autonomous City of Buenos Aires, is the Capital city, capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− glob ...

and

Buenos Aires Province Buenos Aires, officially the Buenos Aires Province, is the largest and most populous Provinces of Argentina, Argentine province. It takes its name from the city of Buenos Aires, the capital of the country, which used to be part of the province an ...

. As Cambiemos was a new coalition with few noteworthy political figures, several members of the cabinet were asked to resign from their positions and run for

Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...

in their respective districts instead.

Peronist Peronism, also known as justicialism, is an Argentine ideology and movement based on the ideas, doctrine and legacy of Juan Perón (1895–1974). It has been an influential movement in 20th- and 21st-century Argentine politics. Since 1946, Pe ...

factions were divided in two main groups; the

Citizen's Unity Citizen's Unity () was a centre-left Kirchnerist political coalition in Argentina for the 2017 legislative elections led by the former President Cristina Fernández de Kirchner. This coalition existed in the provinces of Buenos Aires, Catama ...

, led by the former president

Cristina Kirchner Cristina is a female given name, and it is also a surname. Notable people with the name include: Given name * Cristina (daughter of Edward the Exile), 11th-century English princess * Cristina (singer), Cristina Monet-Palaci (1956–2020), American ...

, led the parliamentary opposition to Macri's administration. Another group was composed of politicians from the

Justicialist Party The Justicialist Party (, ; abbr. PJ) is a major political party in Argentina, and the largest branch within Peronism. Following the 2023 presidential election, it has been the largest party in the opposition against President Javier Milei. Fo ...

and the Renewal Front.

Electoral system

Chamber of Deputies

The 257 members of the

are elected by proportional representation in 24 multi-member constituencies based on the

provinces A province is an administrative division within a country or state. The term derives from the ancient Roman , which was the major territorial and administrative unit of the Roman Empire's territorial possessions outside Italy. The term ''provi ...

(plus the

). Seats are allocated using the

d'Hondt method The D'Hondt method, also called the Jefferson method or the greatest divisors method, is an apportionment method for allocating seats in parliaments among federal states, or in proportional representation among political parties. It belongs to ...

with a 3% electoral threshold. In this election, 127 of the 257 seats are up for renewal for a four-year term.

Senate

The 72 members of the

are elected in the same 24 constituencies, with three seats in each. The party receiving the most votes in each constituency wins two seats, with the third seat awarded to the second-placed party.Electoral system
Inter-Parliamentary Union The 2017 elections will see one-third of Senators renewed, with eight provinces electing three Senators; Buenos Aires, Formosa, Jujuy, La Rioja, Misiones, San Juan, San Luis and Santa Cruz.

Schedule

The timetable for the different national electoral acts was established on the following dates: * 25 April: Closure of the provisional

electoral register An electoral roll (variously called an electoral register, voters roll, voters list, poll book or other description) is a compilation that lists persons who are entitled to vote for particular elections in a particular jurisdiction. The list is ...

. * 5 May: Publication of the provisional electoral register. * 20 May: Deadline to correct the electoral register. * 14 June: Deadline to register the alliances. * 24 June: Deadline to register the pre-nominations for the primary elections (PASO). * 14 July: Beginning of the electoral campaign for the PASO and publication of the definitive electoral register. * 21 July: Beginning of the prohibition of the broadcast of advertisements to capture the vote. * 29 July: Beginning of the prohibition of public acts (inaugurations, announcements) by the government until the PASO. * 11 August: Beginning of the

election silence Election blackout or election silence is the practice of banning political campaigning or media coverage of a general election, before or during that election. Often, the publication of opinion polls is illegal during this time. Operation In som ...

. * 13 August: Primary elections (PASO). * 17 September: Start of the election campaign for the national elections. * 27 September: Beginning of the prohibition to broadcast advertising to capture the vote. * 7 October: Beginning of the prohibition of public acts (inaugurations, announcements) by the government, until the elections. * 14 October: Beginning of the prohibition to publish opinion polls. * 20 October: Beginning of the election silence. * 22 October: National legislative elections.

Results

Chamber of Deputies

Results by province

Senate

Results by province

References

{{Mauricio Macri

Legislative A legislature (, ) is a deliberative assembly with the legal authority to make laws for a political entity such as a country, nation or city on behalf of the people therein. They are often contrasted with the executive and judicial powers ...

Elections in Argentina

Presidency of Mauricio Macri