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.
Institutional Republican Party
It was created in 1989 by former president and dictator Efraín Ríos Montt, and formally registered in 1990. It chose Ríos Montt as its candidate, but he was not allowed to stand because of a constitutional ban on former coup leaders such as himself from seeking the presidency. By the time the decision was made to ban him, it was too late for the FRG to choose another candidate. They did win 10 seats in the National Congress in those concurrent elections. It was the main component of the "No Sell-Out Platform," an alliance of right-wing parties.