The National Action Party (Spanish: Partido Acción Nacional, PAN), founded in 1939, is a conservative political party in Mexico, one of the three main political parties in Mexico. Since the 1980s, it has been an important political party winning local, state, and national elections. In 2000, PAN candidate Vicente Fox was elected president for a six-year term; in 2006, PAN candidate Felipe Calderón succeeded Fox in the presidency. During the period 2000-2012, PAN was the strongest party in both houses of the Congress of the Union (the federal legislature) but lacked a majority in either house. In the 2006 legislative elections the party won 207 out of 500 seats in the Chamber of Deputies and 52 out of 128 Senators. In the 2012 legislative elections, the PAN won 38 seats in the Senate, and 114 seats in the Chamber of Deputies. The members of this party are colloquially called Panistas.