Page "Politics of Spain" Paragraph 2

Spain's political system is a multi-party system, but since the 1990s, two parties have been predominant in politics, the Spanish Socialist Workers ' Party ( PSOE ) and the People's Party ( PP ).

Regional parties, mainly the Basque Nationalist Party ( EAJ-PNV ) from the Basque Country, and Convergence and Union ( CiU ) and the Socialists ' Party of Catalonia ( PSC ) from Catalonia, have also played key roles in Spanish politics.

Members of the Congress of Deputies are selected through proportional representation, and the Executive Government is to be formed by the party or coalition that has the confidence of the Congress, usually the party with the largest number of seats.

Since the Spanish transition to democracy, there have not been coalition governments ; when a party has failed to obtain absolute majority, minority governments have been formed.