Three parties have historically been the dominant parties in Mexican politics: the Institutional Revolutionary Party (PRI), a catch-all party and member of the Socialist International that was founded in 1929 to unite all the factions of the Mexican Revolution and held an almost hegemonic power in Mexican politics since then; the National Action Party (PAN), a conservative party founded in 1939 and belonging to the Christian Democrat Organization of America; and the Party of the Democratic Revolution (PRD) a left-wing party, founded in 1989 as the successor of the coalition of socialists and liberal parties. PRD emerged after what has now been proven was a stolen election in 1988, and has won numerous state and local elections since then. PAN won its first governorship in 1989, and won the presidency in 2000 and 2006.