to form the Reconstruction Party of Canada, but then rejoined the Conservatives in 1938. 1950s 1952: Tilly Rolston, British Columbia Progressive Conservative MLA, crossed the floor to join the British Columbia Social Credit Party of W.A.C. Bennett. 1955: Ross Thatcher, Co-operative Commonwealth Federation (CCF) MP from Saskatchewan, leaves the party to sit as an independent. He runs as a Liberal in the 1957 election but is defeated. Subsequently, becomes leader of the Liberal Party of Saskatchewan and then Premier of Saskatchewan. 1955: Sam Drover leaves the Liberal Party of Newfoundland and Labrador to become the province's first MHA representing the CCF, losing his seat in the next year's election. 1960s 1962: Failed New Democratic Party (NDP) leadership contender and former CCF leader Hazen Argue crosses the floor to the Liberals. 1967: Social Credit Party of Canada MP Bud Olson crosses the floor to the Liberals. 1967: René Lévesque, Quebec MLA for Montreal-Laurier, leaves the Quebec Liberal Party to sit as an independent. Lévesque later formed the Mouvement Souveraineté-Association and then the Parti Québécois, on whose ticket he was re-elected in 1976. 1968: Social Credit leader and MP Robert N. Thompson joins the Progressive Conservative Party. 1969: Liberal MP Perry Ryan (Spadina) quits the Liberal Party to sit as an independent because of the Trudeau government's policies on NATO and its decision to recognize the People's Republic of China. In 1970 Ryan joined the Progressive Conservatives, but lost his seat (coming 3rd) in the 1972 federal election. 1970s 1971: Paul Hellyer, who had left the Liberal caucus to sit as an independent Liberal and subsequently attempted to form a new party, Action Canada, joined the Progressive Conservatives, and sought its leadership in 1976. (In 1982, outside of Parliament and the political spotlight, he rejoined the Liberals, in 1995 formed the Canadian Action Party, and in the 2000s sought to merge it with the NDP.) 1972: Raymond Rock physically crossed the floor from the Liberals caucus to join the Progressive Conservatives. 1974: Garde Gardom, Pat McGeer, and Alan Williams, all BC Liberal MLAs, crossed to Social Credit. 1974: Hugh Curtis, BC Conservative MLA crossed to Social Credit. 1975: Frank Calder, MLA for Atlin since 1949, crossed floor from NDP to Social Credit. 1977: Jack Horner left Progressive Conservatives to join Liberals, ultimately as part of Pierre Trudeau's cabinet. Defeated as Liberal candidate in 1979. 1977: Colin Thatcher, Saskatchewan MLA for Thunder Creek,