Social Democratic Party (Mexico, 1980)

The Social Democratic Party (Partido Socialdemócrata, PSD) was a political party in Mexico during the late 1970s to 1982 with a moderate leftist tendency. It was founded by Manuel Moreno Sánchez (politician), a former member of the Institutional Revolutionary Party

Advocating revolutionary nationalism and a new left stance and founded due to political reforms implemented by José López Portillo y Pacheco. The party was registered on 14 December 1980 which eventually became part of the 1982 elections, in which it nominated Moreno as its presidential candidate. He received 48,412 votes (0.21%) less than the 2% of the vote required to retain party registration, the party dissolved and disappeared.