Following the poor performance of the FGDS in the 1968 legislative elections, with the group re-formed on 11 July 1968 including only 57 deputies,[2] and François Mitterrand subsequently resigned on 7 November, followed by Guy Mollet on 22 December, marking the end of the FGDS.

[6] Following the 1973 legislative elections in which the Socialist Party (PS) competed for the first time, a parliamentary group was formed with the radicals of the MRG (now known as the PRG) with the name Socialist Party and radicals of the left group (groupe du Parti socialiste et des radicaux de gauche) on 2 April,[7] with 102 deputies in total.

[11] In the 2017 legislative elections, the Socialists suffered a historically poor performance, securing only 30 seats in the National Assembly.

[15] The group was reduced by one member after the election of Joël Aviragnet was annulled, forcing a by-election, by the Constitutional Council on 18 December 2017.

[16] After Faure was elected as First Secretary of the French Socialist Party, he was succeeded by Valérie Rabault on 11 April 2018, who secured 21 votes against 7 for Guillaume Garot following the withdrawal of Boris Vallaud that morning.