Institutional Revolutionary Party
Cárdenas's successor Manuel Ávila Camacho gave the party its present name in 1946. The party, under its three different names, held every political position until 1946 when the PAN started winning posts for municipal president and federal deputies and senators, starting in 1946, after the party changed its name to its current name, the Institutional Revolutionary Party. By then, the party had acquired a reputation for corruption, and while this was admitted (to a degree) by some of its affiliates, its supporters maintained that the role of the party was crucial in the modernization and stabilization of Mexico.
1997 Mexican legislative election
Legislative elections were held in Mexico on 6 July 1997. The Institutional Revolutionary Party won 239 of the 500 seats in the Chamber of Deputies, the first time it had failed to win a majority. As a result, the leaders of the Party of the Democratic Revolution and of the National Action Party were able to control Congress and installed PRD member Porfirio Muñoz Ledo as the president of the Chamber of Deputies. At first, the PRI refused to accept the nomination and its parliamentary leader, Arturo Núñez Jiménez, declared it illegal. However, the PRI later accepted the fact and Muñoz Ledo answered the state of the union address of President Ernesto Zedillo.