High Quality Content by WIKIPEDIA articles! The 12th Legislative Assembly of Saskatchewan was elected in the Saskatchewan general election held in June 1952. The assembly sat from February 12, 1953 to May 8, 1956. The Co-operative Commonwealth Federation (CCF) led by Tommy Douglas formed the government.The Liberal Party led by Walter Adam Tucker formed the official opposition. After Tucker returned to federal politics in 1953,Asmundur Loptson served as interim Liberal Party leader.Alexander Hamilton McDonald became Liberal Party leader and leader of the opposition in 1955.