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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.
Agar, Progressive MLA in Saskatchewan, crossed to the governing Liberals as the Progressive movement declined on the prairies.
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 …
Baker, Saskatchewan Labour MLA, crossed to the Liberals, joining the governing party.
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.
Andrews represented the heart of Winnipeg. When the government violently crushed the Winnipeg General Strike of 1919, he couldn't stay in the party. He left to sit alone as an i…
The WWI conscription crisis split the Liberal Party. Most English-speaking Liberal MPs supported conscription and crossed the floor to join the Union Government.
The Conscription Crisis of 1917 shattered the Liberal Party along linguistic and regional lines. When Prime Minister Robert Borden introduced the Military Service Act to impose …
Like Fielding, Carvell supported conscription during WWI and left the Liberals to join the Union Government.
Achim, a Conservative MP from Quebec, broke with the party over the conscription crisis and re-aligned with the Laurier Liberals opposing compulsory military service.
Another Liberal who supported conscription during WWI and crossed the floor.
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 …
Papineau, Liberal MP since 1908, ran and was re-elected as a Conservative in the 1911 election. He later reversed course in 1917, leaving the Conservatives to oppose conscriptio…
David-Arthur Lafortune, a Quebec Liberal MP, broke from the Liberal caucus to sit as an Independent Liberal around 1909, reflecting internal tensions within the Quebec Liberal c…
Henri Bourassa, grandson of Louis-Joseph Papineau and Liberal MP for Labelle, resigned his seat in 1899 to protest Prime Minister Wilfrid Laurier's decision to send Canadian tro…
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…
James Domville, a Conservative MP from Kings County, New Brunswick, and former militia colonel, switched to the Liberal Party around 1896 as the Conservative coalition showed si…
D'Alton McCarthy, one of the most prominent Conservative MPs and a close ally of John A. Macdonald, broke with the Conservative Party over the Manitoba Schools Question — whethe…
Joseph-Israël Tarte, a Quebec Conservative journalist and politician, had been one of the party's most effective organizers in Quebec. However, he became disillusioned with the …
Amyot, Conservative MP for Bellechasse, left the Conservative caucus to sit as a Nationalist, protesting the execution of Louis Riel and the government's treatment of French Can…
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. …
Five Quebec Liberal MLAs — Alexandre Chauveau, Edmund James Flynn, Louis Napoléon Fortin, Étienne-Théodore Pâquet, and Ernest Racicot — crossed the floor to the Conservatives in…
McDonnell, Conservative MP from Inverness, crossed to the Liberals in the wake of the Pacific Scandal.