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Every documented case of a Canadian MP, MPP, MLA, MNA, or MHA switching parties — federal and provincial, 1867 to present. Filter by level, province, or category.
Lela Evans, the Progressive Conservative MHA for Torngat Mountains — a vast northern Labrador riding representing predominantly Inuit and Innu communities — resigned from the PC…
Alleslev left the governing Liberals for the opposition Conservatives, citing concerns about economic and defence policy. This is unusual - most people cross TO the governing pa…
Jansen was a Progressive Conservative who crossed all the way to the left-wing NDP - one of the rarest types of crossing. She cited harassment she experienced during the PC lead…
Lamrock, New Brunswick Liberal MLA for Fredericton-Fort Nashwaak and former Education Minister, left the Liberals to join the NB NDP, citing a shift in his political views towar…
Mourani left the Bloc and publicly renounced her belief in Quebec sovereignty - a fundamental change of heart. She wanted to join the NDP, but the NDP has a policy against accep…
Cools, a Liberal senator since 1984, crossed to the newly formed Conservative Party in 2004 over her opposition to same-sex marriage legislation. She was the first Black Canadia…
Brien, Bloc Québécois MP for Témiscamingue, left the BQ to sit as an independent, expressing waning interest in the sovereignist cause.
One of the most dramatic ideological shifts - from the left-wing NDP all the way to the right-wing Progressive Conservatives.
Cullen, Ontario Liberal MPP for Ottawa West, left the Liberals to join the Ontario NDP, citing disagreements over the party's direction on social policy.
Holden represented English-speaking Westmount in a party that fought for English language rights. He crossed to the Parti Québécois - a French-first, pro-independence party. It …
Ramsay, Ontario NDP MPP for Timiskaming, left the NDP to join the Ontario Liberals under David Peterson.
Lupusella, Ontario NDP MPP for Dovercourt, left the NDP to join the Ontario Liberals alongside David Ramsay.
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…
Hellyer left the Liberals, tried to start his own party, joined the Conservatives, then went back to the Liberals, then started another party. He crossed the floor more times th…
Lévesque believed Quebec should become its own country. The Liberals disagreed. So he left and eventually founded the Parti Québécois.
Thatcher was a socialist MP, but over time his views shifted dramatically to the right. He left the CCF because he no longer believed in their policies.
Drover left the Newfoundland Liberal Party to become the province's first Member of the House of Assembly representing the CCF (predecessor to the NDP).
Ernest Edward Perley, a Liberal MP from Saskatchewan, crossed to the Conservative Party around 1935 during the Great Depression. Like several western MPs, Perley was dissatisfie…
Already in DB as william-hammell-1922.
Knox, elected as a Liberal-Unionist in 1917, joined the growing Progressive movement in 1919 as prairie farmers organized politically against the traditional parties.
John Costigan had served as a Conservative MP for over 30 years and had been a cabinet minister under four Conservative prime ministers — John A. Macdonald, John Abbott, John Th…
John Wallace, a Liberal MP from Ontario, crossed the floor to join the Liberal-Conservative Party in 1883. Like several Ontario MPs of the era, Wallace was attracted by John A. …
McDonnell, Conservative MP from Inverness, crossed to the Liberals in the wake of the Pacific Scandal.
MacKay, Conservative MP from Cape Breton, crossed to the Liberals in 1873 during the Pacific Scandal crisis that brought down John A. Macdonald's government.