Institutional Revolutionary Party
The Institutional Revolutionary Party (, PRI) is a Mexican political party founded in 1929 that held uninterrupted power in the country for 71 years from 1929 to 2000, first as the National Revolutionary Party (, PNR), then as the Party of the Mexican Revolution (, PRM), and finally renaming itself as the Institutional Revolutionary Party in 1946.
1929 Mexican general election
The National Revolutionary Party, founded in 1928 by Mexico's most powerful leader at the time, Plutarco Elías Calles, made its debut in these elections. The 1929 elections marked the beginning of 71 uninterrupted years of rule by that party, which was later renamed Party of the Mexican Revolution in 1938 and finally, Institutional Revolutionary Party (PRI) in 1946. No opposition party would win a Presidential election until the 2000 elections.