PSOE - Partido Socialista Obrero Español Info
- One of Spain's two main national political parties, the other being the PP - Partido Popular. The PSOE was transformed from a democratic Marxist party to a liberal democratic party in 1978. It came to power in 1982 and remained in government until 1996. Under the leadership of José Luis Rodríguez Zapatero it returned to power in 2005 and increased its share of the vote in the 2008 general elections.