Politics of Chile Politics of Chile Chile's government is a representative democratic republic, whereby the President of Chile is both head of state and head of government, and of a formal multi-party system that in practice behaves like a two-party one, due to binomialism. Executive power is exercised by the government. Legislative power is vested in both the government and the two chambers of the National Congress. The judiciary is independent of the executive and the legislature of Chile. The Constitution of Chile was approved in a national plebiscite in September 1980, under the military government of dictator Augusto Pinochet. It entered into
Chile the "Concertación", received an absolute majority of votes (55%). President Aylwin served from 1990 to 1994, in what was considered a transition period. In December 1993, Christian Democrat Eduardo Frei Ruiz-Tagle, the son of previous president Eduardo Frei Montalva, led the Concertación coalition to victory with an absolute majority of votes (58%). Frei Ruiz-Tagle was succeeded in 2000 by Socialist Ricardo Lagos, who won the presidency in an unprecedented runoff election against Joaquín Lavín of the rightist Alliance for Chile. In January 2006, Chileans elected their first female president, Michelle Bachelet Jeria, of the Socialist Party, defeating Sebastián Piñera, of