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José Luis Rodríguez Zapatero is a Spanish politician who was the Prime Minister of Spain from 2004 to 2011. He is a member of the Spanish Socialist Workers' Party (PSOE) and was the party's leader from 2000 to 2012. Zapatero maintained strong diplomatic ties with Portugal, particularly with the Portuguese Prime Minister José Sócrates. The two leaders worked together to promote economic cooperation and regional integration in the Iberian Peninsula.