Left-of-center party formed by a merger of the Sammarinese Socialist Party (PSS) and the Party of Democrats (PD).
Party formed the 'We for the Republic' coalition with the Socialist Party and the Democratic Movement San Marino Together ahead of elections held on December 8 2019. Coalition holds 12 seats.
Party is led by its General secretary Gerardo Giovagnoli [Partito dei Socialisti e dei Democratici, PSD)]