Yes, Spain has a separation of powers between the executive, legislative, and judiciary branches. The Spanish Constitution, which was adopted in 1978, establishes the principles of the separation of powers and the rule of law.

The executive branch is headed by the Prime Minister and includes the Council of Ministers. The legislative branch is composed of the Congress of Deputies and the Senate, and the judiciary branch is independent and composed of various courts and tribunals.

In terms of political representation, Spain has a multi-party system with several major parties and smaller regional parties. The Congress of Deputies is elected through a proportional representation system, and the Senate has both appointed and elected members.

While Spain's democracy has faced some challenges and criticisms, particularly with regards to corruption and Catalonia's push for independence, it is generally considered to be a functioning democracy that respects the separation of powers and political representation. However, as with any political system, there are ongoing debates and efforts to improve and strengthen democratic institutions and practices.
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