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All Floor Crossings
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.
31 crossings
Matt Jeneroux
2026NotableConservative → LiberalMPAlberta
4/5
Jeneroux was the third Conservative to join the Liberals. He represents Edmonton-Riverbend - deep in Alberta Conservative country. An Alberta Conservative joining the Liberals i…
Joined Government
Chris d'Entremont
2025NotableConservative → LiberalMPNova Scotia
4/5
D'Entremont was a Conservative MP from Nova Scotia who crossed the floor to join Prime Minister Mark Carney's Liberal government. He was the first of three Conservative MPs to m…
Joined Government
Brendan Maguire
2024Liberal → Prog. ConservativeMLANova Scotia
4/5
Maguire left the Nova Scotia Liberals and joined the governing Progressive Conservatives.
Wanted PromotionGot Cabinet
ES
Elenore Sturko
2024BC United → BC ConservativeMLABritish Columbia
4/5
Sturko, BC United MLA for Surrey-Cloverdale, crossed to the BC Conservatives as BC United suspended its campaign in 2024.
Party Collapsing
FT
Fred Tilley
2024Liberal → Progressive ConservativeMLANova Scotia
4/5
Tilley, Liberal MLA for Northside-Westmount, crossed to the PCs in 2024, joining the governing party.
Joined Government
IP
Ian Paton
2024BC United → BC ConservativeMLABritish Columbia
4/5
Paton, BC United MLA for Delta South, crossed to the BC Conservatives in 2024 as BC United suspended its campaign.
Party Collapsing
LD
Lorne Doerkson
2024BC United → BC ConservativeMLABritish Columbia
4/5
Doerkson, BC United MLA for Cariboo-Chilcotin, individually crossed to the BC Conservatives as BC United collapsed in 2024.
Party Collapsing
Peter Milobar
2024BC United → BC ConservativeMLABritish Columbia
4/5
Milobar, BC United MLA for Kamloops-Centre, crossed to the BC Conservatives as BC United collapsed in 2024.
Party Collapsing
Teresa Wat
2024BC United → BC ConservativeMLABritish Columbia
4/5
Wat, BC United MLA for Richmond North Centre, crossed to the BC Conservatives as BC United collapsed in 2024.
Party Collapsing
TH
Trevor Halford
2024BC United → BC ConservativeMLABritish Columbia
4/5
Halford, BC United MLA for Surrey-White Rock, crossed to the BC Conservatives as BC United suspended its campaign.
Party Collapsing
CM
Christopher Mitchelmore and Dale Kirby
2013NotableNDP → LiberalMHANewfoundland
4/5
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.
Fought Their LeaderGot Cabinet
ÉC
Éric Caire and Marc Picard
2009NotableADQ → IndependentMNAQuebec
4/5
Caire and Picard, Quebec ADQ MNAs, left the ADQ to sit as independents. They were among the founding members of the Coalition Avenir Québec when it formed in 2011.
Joined New PartyGot Cabinet
Keith Martin
2004NotableCanadian Alliance → LiberalMPBritish Columbia
4/5
Martin, a physician and MP for Esquimalt-Juan de Fuca, left the Canadian Alliance (which was merging with the PCs) to join the Liberals, saying the new Conservative Party was to…
Changed Beliefs
Scott Brison
2003NotableProg. Conservative → LiberalMPNova Scotia
4/5
When the Progressive Conservatives merged with the Canadian Alliance to form today's Conservative Party, Brison refused to go along. He joined the Liberals instead.
Party MergedGot Cabinet
JM
Jim Melenchuk and Ron Osika
2001NotableSaskatchewan Liberal → Saskatchewan NDPMLASaskatchewan
4/5
Melenchuk and Osika, the last two Saskatchewan Liberal MLAs, crossed to the governing NDP, effectively ending the Saskatchewan Liberals as a legislative force.
Joined GovernmentGot Cabinet
DP
David Price
2000Progressive Conservative → LiberalMPQuebec
4/5
Price, PC MP for Compton-Stanstead, crossed to the Liberals along with several other Quebec PCs in 2000.
Switched Sides
GW
Gordon Wilson
1999NotableProgressive Democratic Alliance → BC NDPMLABritish Columbia
4/5
Wilson, PDA MLA and former BC Liberal leader, crossed to the governing BC NDP under Premier Ujjal Dosanjh, receiving a cabinet appointment.
Joined GovernmentGot Cabinet
PV
Pierrette Venne
1990Progressive Conservative → Bloc QuébécoisMPQuebec
4/5
Venne left the PC caucus to join the Bloc Québécois as a founding member, motivated by Quebec sovereignty.
Started New Party
GR
Gilles Roch
1986Manitoba Liberal → Progressive ConservativeMLAManitoba
4/5
Roch, Manitoba Liberal MLA for Springfield, crossed to the PCs after failing to secure a Liberal nomination for the next election.
Wanted PromotionGot Cabinet
CT
Colin Thatcher
1977NotableLiberal → Progressive ConservativeMLASaskatchewan
4/5
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…
Changed BeliefsGot Cabinet
Jack Horner
1977NotableProgressive Conservative → LiberalMPAlberta
4/5
Horner was an Alberta Conservative who crossed to join Pierre Trudeau's Liberal cabinet. In Alberta, being a Liberal is almost unthinkable - this was a huge deal.
Wanted PromotionGot Cabinet
Lucien Lamoureux
1968NotableLiberal → 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…
Stood on Principle
Robert N. Thompson
1968Social 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.
Changed Beliefs
Hazen Argue
1962NotableNDP → LiberalMPSaskatchewan
4/5
Argue ran to be leader of the new NDP but lost to Tommy Douglas. Bitter about the loss, he crossed to the Liberals.
Lost Leadership Race