All Floor Crossings

Brendan Maguire

2024

Liberal → Prog. ConservativeMLANova Scotia

4/5

Maguire left the Nova Scotia Liberals and joined the governing Progressive Conservatives.

Sandra Jansen

2016Notable

Prog. Conservative → NDPMLAAlberta

3/5

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…

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.

Tom Osborne

2012Notable

Progressive Conservative → LiberalMHANewfoundland

5/5

Osborne, a long-serving PC MHA, left the PC caucus and joined the Liberals, citing dissatisfaction with the party's direction.

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

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.

David Emerson

2006Notable

Liberal → ConservativeMPBritish Columbia

5/5

This is one of the most controversial crossings in Canadian history. Emerson was elected as a Liberal, and just TWO WEEKS later, he crossed to join Stephen Harper's new Conserva…

Belinda Stronach

2005Notable

Conservative → LiberalMPOntario

5/5

In one of the most dramatic moments in Canadian parliamentary history, Stronach crossed the floor to join Paul Martin's Liberal cabinet. Her single vote helped save the minority…

Scott Brison

2003Notable

Prog. 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.

Dennis Fentie

2002Notable

NDP → Yukon PartyMLAYukon

5/5

Fentie left the Yukon NDP and joined the Yukon Party.

Melenchuk and Osika, the last two Saskatchewan Liberal MLAs, crossed to the governing NDP, effectively ending the Saskatchewan Liberals as a legislative force.

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…

Wilson, PDA MLA and former BC Liberal leader, crossed to the governing BC NDP under Premier Ujjal Dosanjh, receiving a cabinet appointment.

Buckley Belanger

1998Notable

Saskatchewan Liberal → Saskatchewan NDPMLASaskatchewan

5/5

Belanger, Saskatchewan Liberal MLA for Athabasca, crossed to the governing NDP, joining the party he felt better served his northern riding's interests.

Neufeld left the Reform Party of BC to join the BC Liberals, the new dominant centre-right party, as Reform faded provincially.

Wilson, former BC Liberal leader, and Tyabji left the Liberals after Wilson was ousted as leader due to a personal scandal involving his relationship with Tyabji. They founded t…

David Kilgour

1990Notable

Prog. Conservative → IndependentMPAlberta

3/5

Kilgour left the Conservatives over policy disagreements. He later joined the Liberals. Then in 2005, he left the Liberals too - one of only two people to cross the floor twice.

Ramsay, Ontario NDP MPP for Timiskaming, left the NDP to join the Ontario Liberals under David Peterson.

Roch, Manitoba Liberal MLA for Springfield, crossed to the PCs after failing to secure a Liberal nomination for the next election.

Rideout, a Newfoundland Liberal MHA, crossed to the PCs over his opposition to the federal government's handling of offshore resource ownership, siding with Brian Peckford's pos…

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…

Jack Horner

1977Notable

Progressive 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.

Frank Calder

1975Notable

NDP → Social CreditMLABritish Columbia

3/5

Calder was the first Indigenous person elected to any legislature in Canada, serving 26 years as a CCF/NDP member. He crossed to Social Credit, the governing party.

Three BC Liberal MLAs crossed to Social Credit as the free-enterprise coalition consolidated against the NDP. This effectively merged the BC Liberals into Social Credit.