Paraguay is governed under the 1992 constitution. The president, who is both head of state and head of government, is popularly elected to a five-year term and cannot be reelected. The legislature has two houses, the 45-seat Chamber of Senators and the 80-seat Chamber of Deputies. Members of both are popularly elected for five-year terms. The two main parties, both conservative, are the Colorado party, which has governed almost exclusively since 1947, and the Authentic Radical Liberal party. Administratively, the country is divided into 17 departments and the capital city.