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.
Workers Revolutionary Party - Revolutionary Left
The Workers Revolutionary Party - Revolutionary Left (Spanish language: "Partido Revolucionario de los Trabajadores-Izquierda Revolucionaria". PRT-IR) was a Spanish Trotskyist political organization, formed in the summer of 2002 as a result of the merger of the Workers Revolutionary Party (PRT) and the Revolutionary Left (IR). Organizing the struggle for socialism was the main goal of the formation. It was the official section in Spain of the International Workers' League - Fourth International (IWL).