Founding in 2004–2005

Originally as Social Democratic and Peasant Alternative Party, the party started as an alliance between two political leaders, Ignacio Irys Salomon and Patricia Mercado along with peasantry factions. Although, most of its members also come from four other social democratic parties who have lost registration and merged from the following Social Democracy Party led by Gilberto Rincón Gallardo, México Posible (originally led by Patricia Mercado), Fuerza Ciudadana and the Partido Campesino y Popular.^[2][3]

2006 elections

During 2006, The peasant wing of the PSD was headed by Ignacio Irys Salomón, as part of the fractured Coalition of Urban and Peasant Democratic Organizations which brings together ejidatarios, small landowners and commoners.^[4]

The party was seriously fractured, since it was a new party right before the 2006 elections. The peasant wing decided to promote the candidacy of pharmaceutical businessman Víctor González Torres, who was highly popular among them and challenged Mercado's candidacy, assuming that the latter did not have sufficient support within the party. González Torres proclaimed himself as candidate and began a media campaign against Mercado. The Electoral Institute ratified Mercado's candidacy for presidential candidate of the party.^[5][6]

After ratification was confirmed for Mercado, Víctor González campaigned without a political party or registration as a candidate.^[3]

in the 2006 elections the PSD managed to obtain 2.11% of the total votes, while in the 2006 legislative elections the party won 4 out of 500 seats in the Chamber of Deputies but no senators elected.

Dissolution

The Social Democratic Party came to an end after the results in the 2009 legislative elections; the party won only 1.03% of the vote and did not reach the 2.0% required to be known as a political party, thus losing registration and dissolving.^[1][7] Some of its principal members joined the Citizens' Movement Party.^[8]