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.

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.

[8] The PSD opposed the public influence of the Roman Catholic Church and has challenged the moral and teaching authority of Archbishop of Mexico Cardinal Norberto Rivera.

It also pleaded in favor of equal marriage, euthanasia, the decriminalization of abortion and the legalization of some drugs.