All Floor Crossings

On February 28, 2018, seven of the Bloc Québécois's ten MPs left the party following leader Martine Ouellet's defeat in a leadership review referendum. The departing MPs — Miche…

Mitchelmore and Kirby left the NL NDP caucus in protest against the leadership of Lorraine Michael. They briefly sat as "Independent NDP" before joining the Liberals.

John van Dongen

2012

BC Liberal → BC ConservativeMLABritish Columbia

0/5

Van Dongen, a long-serving BC Liberal MLA, crossed to the BC Conservatives in 2012, citing dissatisfaction with Premier Christy Clark's leadership.

Six PQ MNAs — Louise Beaudoin, Pierre Curzi, Lisette Lapointe, Jean-Martin Aussant, Benoit Charette, and René Gauvreau — left the PQ to sit as independents, citing deep dissatis…

Casey, PC MLA for Colchester North, crossed to the Liberals in 2011 after clashing with PC leader Jamie Baillie.

Louise Thibault, a Bloc Québécois MP for Rimouski-Neigette—Témiscouata—Les Basques, left the BQ caucus in April 2007 to sit as an Independent. Thibault was elected in the 2004 e…

Malley, New Brunswick PC MLA, left the PC caucus to sit as an independent following disputes with the party leadership.

Lebel, Bloc Québécois MP for Chambly, left the BQ caucus to sit as an independent over disagreements with the party leadership.

Mark, MP for Dauphin-Swan River, was part of the DRC dissident group within the Canadian Alliance. He left and eventually joined the Progressive Conservatives.

Carignan, a Liberal senator from Quebec, left the Liberal caucus to sit as an independent in the Senate over policy disagreements.

In the summer of 2001, approximately fourteen Canadian Alliance MPs — including Deborah Grey (the party's first-ever MP), Chuck Strahl, Grant McNally, Val Meredith, Jay Hill, Ji…

Bernard St-Laurent, a Bloc Québécois MP for Manicouagan, broke with the party in March 1997 following internal disputes with the BQ leadership. St-Laurent had been elected in th…

Denis Pronovost, a Progressive Conservative MP from Quebec, left the Conservative caucus in June 1993 as the Mulroney government was in its death throes. Pronovost was part of t…

John Patrick (Pat) Nowlan

1990

Progressive Conservative → Independent ConservativeMPNova Scotia

0/5

Pat Nowlan, a veteran Progressive Conservative MP for Annapolis Valley—Hants who had served since 1965, left the Conservative caucus in June 1990 over deep disagreements with Br…

Stanley Stanford Schumacher, a Conservative MP from Palliser in Alberta, left the PC caucus to sit as an Independent in 1978 over a dispute with party leader Joe Clark. Schumach…

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…

Gordon Minto Churchill

1968Notable

Progressive Conservative → Independent Progressive ConservativeMPManitoba

0/5

Gordon Churchill was a towering figure in Progressive Conservative politics — one of John Diefenbaker's most loyal cabinet ministers who served as Minister of Trade and Commerce…

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…

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…

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…

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 …