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The Spanish Electoral System

This chapter examines the Spanish electoral system, meaning—first and foremost—the one used to elect the lower house (Congreso de los Diputados). After a brief description of its components, the chapter assesses how its scarce proportionality has traditionally led Spanish politics towards a two-party system. The chapter also assesses some other of its alleged outcomes (such as the malapportionment, the weight of the regional parties, or the robustness of democracy) and its prospects for the future. Finally, the chapter also examines the ‘other’ Spanish electoral systems—that is, the ones used to elect the Senate, the local councils, the regional parliaments, and the Spanish seats in the European Parliament.