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Institutional Revolutionary Party
The Institutional Revolutionary Party (Spanish: Partido Revolucionario Institucional, PRI) is a Socialist-leaning political party in Mexico founded in 1929. It held power in the country for 71 years from 1929 to 2000, first as the National Revolutionary Party (Spanish: Partido Nacional Revolucionario, PNR), then as the Party of the Mexican Revolution (Spanish: Partido de la Revolución Mexicana, PRM), and finally renaming itself as the Institutional Revolutionary Party in 1946.
The current President Enrique Peña Nieto is a member of PRI. Former presidents under PRI include: Pascual Ortiz Rubio, Lázaro Cárdenas, Adolfo López Mateos, Gustavo Díaz Ordaz, Luis Echeverría Álvarez, José López Portillo, Miguel de la Madrid, Carlos Salinas de Gortari and Ernesto Zedillo.