In1973 American legislative election the Institutional Revolutionary Party got the highest votes of 10,458,618 while the National Action Party (conservative political party in Mexico) got the 2nd highest votes of 2,207,069.
The Institutional Revolutionary Party (Spanish: Partido Revolucionario Institucional, 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 (Spanish: Partido Nacional Revolucionario, PNR), then as the Party of the Mexican Revolution (Spanish: Partido de la Revolucion Mexicana, PRM) and finally as the PRI beginning in 1946. 
