Institutional Revolutionary Party

The Institutional Revolutionary Party (Spanish: Partido Revolucionario Institucional, pronounced [paɾˈtiðo reβolusjoˈnaɾjo jnstitusjoˈnal], PRI) is a political party in Mexico that was founded in 1929 as the National Revolutionary Party (Spanish: Partido Nacional Revolucionario, PNR). It became the Party of the Mexican Revolution (Spanish: Partido de la Revolución Mexicana, PRM) in 1938 and the PRI in 1946.

Source: Wikipedia — Institutional Revolutionary Party (CC BY-SA 4.0)