The party was for a long time allied with Peronism in elections. Alende was presidential candidate in 1963, 1973, and 1983 without much success.
The party had its most successful period in 1985, becoming the third-largest party. It fell into oblivion after allying with the Justicialist Party from 1987.
The party was part of the FrePaSo coalition from the 1990s and entered government in 1999 as part of the Alianza between FrePaSo and the Radical Civic Union that brought Fernando de la Rúa to the presidency. The Alianza collapsed in 2001 and FrePaSo effectively disappeared.