In 1970, Talamantes was released from prison due to the law of social dissolution being repealed by then president Gustavo Díaz Ordaz, many other student protesters were among those released. Aguilar soon after left the Mexican Communist Party, claiming the party had done nothing to get him out of prison. Talamantes along with other prominent members of the student movement, as well as members of the Marxist leftist movement, the Movement of National Liberation , formed the Comité Nacional de Auscultación y Organización in 1971. The organization however suffered a split between those that wanted to adopt Marxism–Leninism ideology and those that wanted to adopt a party language more in line with what they felt was the voice of the Mexican people. Demetrio Vallejo and Heberto Castillo split to form the Mexican Workers' Party , Rafael Aguilar Talamantes, along with Graco Ramírez, formed the Socialist Workers' Party PST.
The PST was founded as a Marxist political party that believed in the expropriation of financial institutions and many industries, also believing management of state enterprises should be handled by the workers and peasants. The PST secured registration in 1978 and in the following year it was given proportional representation seats, continuing to win 9-12 seats the following periods in 1982 and '85. In 1987 the PST split again as Graco Ramírez was expelled from the party, often cited as differences over the direction the party was taking. In 1988, after having served as the party Secretary General from 1975 to '76 and President from 79-87, the party was renamed to the Party of the Cardenist Front of National Reconstruction . In 1987 the PFCRN allied itself with the National Democratic Front, which supported the candidacy of Cuauhtémoc Cárdenas Solórzano, a former PRI member who had left the party and was running for the presidency supported by a large number of leftist parties and organizations. Cárdenas lost the election to PRI candidate Carlos Salinas de Gortari, it is believed after massive election fraud. After the elections of 1988, Aguilar Talamantes separated from the FDN, and the PFCRN supported many of the policies of the ex-president Carlos Salinas de Gortari. In 1988 the party proportional representation in Congress rose from 12 seats to 41. In the elections of 1994 Aguilar Talamantes was the PFCRN candidate to the Presidency, but obtained only 0.85% of the vote, with which it was in sixth place. His party lost its official recognition, recovered it as the Cardenist Party in 1997, but that same year would lost its registry definitively. At the moment, Aguilar Talamantes one has seen near the Socialdemocratic Party, he supported the candidacy of Patricia Mercado in the presidential elections of the 2006.
