The National Congress of Argentina is the legislative branch of the government of Argentina. Its composition is bicameral, constituted by a 72-seat Senate and a 257-seat Chamber of Deputies. The Senate, whose members are elected to six-year terms renewable by thirds each two years, consists of three representatives from each province and the federal capital. The Chamber of Deputies, whose members are elected to four-year terms, is apportioned according to population, and renews their members by a half each two years.

The Radical Civic Union is a centrist and liberal political party in Argentina. It has been ideologically heterogeneous, ranging from conservatism to social democracy, but since 1995 it has been a member of the Socialist International.