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.
Socialist Mexican Party
The party participated solely in the 1988 elections, in which it had postulated Heberto Castillo as its candidate. A month before the elections, Castillo decided to decline his candidacy in favor of Cuauhtémoc Cárdenas Solórzano and integrate himself in the National Democratic Front that postulated Cárdenas to the Presidency of the Republic. In 1989, after the electoral process had finished, the PMS integrated with the old Democratic Current of the PRI and constituted the Party of the Democratic Revolution, with the own legal registry of the PMS.