All Floor Crossings

Ramsay, Ontario NDP MPP for Timiskaming, left the NDP to join the Ontario Liberals under David Peterson.

Roch, Manitoba Liberal MLA for Springfield, crossed to the PCs after failing to secure a Liberal nomination for the next election.

Rideout, a Newfoundland Liberal MHA, crossed to the PCs over his opposition to the federal government's handling of offshore resource ownership, siding with Brian Peckford's pos…

Richard Janelle, one of the last Social Credit MPs, crossed the floor to join the Progressive Conservative Party in 1979 as it became clear that Social Credit had no future in f…

Thatcher, Saskatchewan Liberal MLA for Thunder Creek and son of former Premier Ross Thatcher, defected to the PCs over dissatisfaction with the provincial Liberal party's direct…

Jacques Lavoie, a Progressive Conservative MP from Quebec, crossed the floor to join the Liberal Party in 1977. His switch came during a period of intense political flux in Queb…

Three BC Liberal MLAs crossed to Social Credit as the free-enterprise coalition consolidated against the NDP. This effectively merged the BC Liberals into Social Credit.

Curtis, a BC Conservative MLA, crossed to Social Credit as part of the consolidation of the free-enterprise coalition against the Barrett NDP government.

Roch La Salle, a Progressive Conservative MP from Joliette in Quebec, briefly sat as an Independent in the early 1970s during a dispute with PC leader Robert Stanfield. La Salle…

Lucien Lamoureux

1968Notable

Liberal → IndependentMPOntario

4/5

Lucien Lamoureux, the Liberal MP for Stormont—Dundas in eastern Ontario, chose to sit as an Independent in 1968 when he was elected Speaker of the House of Commons. While Speake…

Robert N. Thompson

1968

Social Credit → Progressive ConservativeMPAlberta

4/5

Thompson, former national leader of Social Credit, crossed to the PCs after the Social Credit Party fragmented and lost relevance federally.

Bud Olson

1967Notable

Social Credit → LiberalMPAlberta

5/5

Olson, MP for Medicine Hat, left the declining Social Credit Party to join the Liberals under Pierre Trudeau, who offered him a cabinet position.

René Lévesque, the charismatic former journalist and Quebec Liberal cabinet minister, had become increasingly convinced that Quebec needed sovereignty to protect its language, c…

Gilles Grégoire

1966Notable

Ralliement des créditistes → IndependentMPQuebec

3/5

Gilles Grégoire, a founding member and key organizer of the Ralliement des créditistes (the Quebec wing of Social Credit), was expelled from the party around 1966 after clashing…

Thirteen Quebec-based Social Credit MPs, led by Réal Caouette, split from the national Social Credit Party to form the Ralliement des créditistes, a Quebec-focused populist part…

Rolston, a BC Progressive Conservative MLA, crossed the floor to join W.A.C. Bennett's new Social Credit government.

In late 1944, when Mackenzie King finally implemented limited conscription for overseas service (the "Zombies" crisis), several Quebec Liberal MPs broke with the party to sit as…

Thomas Alexander Crerar

1930Notable

Progressive / United Farmers → LiberalMPManitoba

5/5

Thomas Alexander Crerar, the founder and first leader of the Progressive Party of Canada, had resigned the party leadership in 1922 and later sat as a United Farmers of Manitoba…

The Progressive Party of Canada, which had won 65 seats in the 1921 election to become the second-largest party in Parliament, gradually disintegrated during the 1920s as Macken…

Alan Webster Neill, a Progressive MP from Comox—Alberni in British Columbia, left the Progressive Party around 1925 to sit as an Independent. Neill was a committed advocate for …

Knox, elected as a Liberal-Unionist in 1917, joined the growing Progressive movement in 1919 as prairie farmers organized politically against the traditional parties.

Frank Broadstreet Carvell

1917Notable

Liberal → Liberal-UnionistMPNew Brunswick

4/5

Like Fielding, Carvell supported conscription during WWI and left the Liberals to join the Union Government.

Hugh Guthrie

1917Notable

Liberal → UnionistMPOntario

4/5

Another Liberal who supported conscription during WWI and crossed the floor.

William Stevens Fielding

1917Notable

Liberal → Liberal-UnionistMPNova Scotia

2/5

During World War I, the government wanted to force men to fight overseas (conscription). Fielding, a senior Liberal, supported conscription even though his party leader Wilfrid …