All Floor Crossings

Raymond Rock

1972

Liberal → New Democratic PartyMPQuebec

0/5

Rock, Liberal MP for Lachine, crossed to the NDP over disagreements with the Liberal government's policies.

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…

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…

Léon Balcer

1965Notable

Progressive Conservative → IndependentMPQuebec

0/5

Léon Balcer, one of the most senior Quebec Progressive Conservative MPs and a former cabinet minister under John Diefenbaker, left the PC caucus in 1965 over what he saw as the …

Rémi Paul, a Progressive Conservative MP from Quebec, left the PC caucus around 1965 as part of the broader Quebec Conservative revolt against John Diefenbaker's leadership. Lik…

Ouellet and Girouard, Social Credit MPs from Quebec, left the fragmenting Social Credit party to join the Progressive Conservatives.

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…

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…

Maxime Raymond

1943Notable

Liberal → Bloc populaire canadienMPQuebec

0/5

Maxime Raymond, a veteran Liberal MP from Quebec, founded the Bloc populaire canadien in September 1942, breaking decisively with the Liberal Party over Prime Minister Mackenzie…

Édouard Lacroix

1943

Liberal → Bloc populaire canadienMPQuebec

2/5

Édouard Lacroix, a wealthy Quebec lumber baron and Liberal MP, joined Maxime Raymond's Bloc populaire canadien in 1943, providing the fledgling party with crucial financial back…

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.

Louis-Joseph Papineau

1911

Liberal → ConservativeMPQuebec

2/5

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

1900Notable

Liberal → IndependentMPQuebec

4/5

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…

Joseph-Israël Tarte

1893Notable

Conservative → LiberalMPQuebec

4/5

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 …

Guillaume Amyot

1887

Conservative → NationalistMPQuebec

1/5

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…

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…