The Social Democratic Radical Party (Partido Radical Socialdemócrata)'s a social democratic party in Chile. The party's a member of Socialist International. The party was founded in August 18, 1994, out of a union between the Radical Party (Chile) and the Social Democratic Party of Chile, both of which had received poor results in the parliamentary elections. The party supported Ricardo Lagos in the 1999/2000 presidential elections, who won 48.0% in the first round and was elected with 51.… (More on Prsd)