The Politics of Sicily, Italy takes place in a framework of a semi-presidential representative democracy, whereby the President of Regional Government is the head of government, and of a pluriform multi-party system. Executive power is exercised by the Regional Government. Legislative power is vested in both the government and the Sicilian Regional Assembly.
The oldest organised party of Sicily was the Sicilian Socialist Party, founded out from the Fasci Siciliani in 1893, but the region was primarily a stronghold of the liberal establishment (see Historical Right, Historical Left and Liberals) that governed Italy for decades. However, by the end of the 19th century, Sicily elected several deputies from left-wing parties, namely the Radical Party, the Italian Republican Party, the Italian Socialist Party and the Italian Reformist Socialist Party.
After Italian Fascism (whose partisan arm, the National Fascist Party was well supported in the region) and the Allied invasion of Sicily during the World War II, Sicily increasingly became a stronghold of Christian Democracy, in opposition to the Italian Communist Party. Sicilians had also a penchant for conservative/nationalist politics, represented mainly by the Monarchist National Party and the Italian Social Movement.