 This rapid decline in their popularity reduced the party to two seats in the 1951 election and allowed the Ontario Liberal Party to become the Official Opposition.No social democratic party would be the Official Opposition again until 1975, when Stephen Lewis's NDP displaced the Liberals as the second party in the Legislative Assembly of Ontario.Beginning with the 1951 provincial campaign, the Ontario Federation of Labour (OFL) played an increased role in the Ontario CCF by lending it organizational, personnel and material support.