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Legislative elections were held in Argentina on 22 October 2017[1] to elect half of the Chamber of Deputies and one third of the Senate. The result was a victory for the ruling Cambiemos alliance, being the most voted force in 13 of the 24 districts.[2]
Background
The elections took place during the presidency of Mauricio Macri whose Cambiemos coalition also governed the City of Buenos Aires and Buenos Aires Province. 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 in their respective districts instead.[3]
The 257 members of the Chamber of Deputies are elected by proportional representation in 24 multi-member constituencies based on the provinces (plus the City of Buenos Aires). Seats are allocated using the d'Hondt method with a 3% electoral threshold.[6] In this election, 127 of the 257 seats are up for renewal for a four-year term.
The 72 members of the Senate 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.[7] 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.
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