All Floor Crossings

Maïté Blanchette Vézina

2026Notable

Coalition Avenir Québec → Conservative Party of QuebecMNAQuebec

2/5

Blanchette Vézina, CAQ MNA and former cabinet minister, crossed to the Conservative Party of Quebec in 2026.

Lela Evans (1st crossing)

2022Notable

Progressive Conservative → NDPMLANewfoundland and Labrador

1/5

Lela Evans, the Progressive Conservative MHA for Torngat Mountains — a vast northern Labrador riding representing predominantly Inuit and Innu communities — resigned from the PC…

Leona Alleslev

2018Notable

Liberal → ConservativeMPOntario

2/5

Alleslev left the governing Liberals for the opposition Conservatives, citing concerns about economic and defence policy. This is unusual - most people cross TO the governing pa…

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…

Patry, NDP MP for Jonquière-Alma, crossed to the Bloc Québécois in February 2013, saying he could better serve his constituents and Quebec national interests with the BQ.

Lamrock, New Brunswick Liberal MLA for Fredericton-Fort Nashwaak and former Education Minister, left the Liberals to join the NB NDP, citing a shift in his political views towar…

Maria Mourani

2013Notable

Bloc Québécois → IndependentMPQuebec

0/5

Mourani left the Bloc and publicly renounced her belief in Quebec sovereignty - a fundamental change of heart. She wanted to join the NDP, but the NDP has a policy against accep…

St-Denis, NDP MP for Saint-Maurice-Champlain, crossed to the Liberals in January 2012, just months after the NDP's historic Quebec sweep, saying she had always been a Liberal at…

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.

Cools, a Liberal senator since 1984, crossed to the newly formed Conservative Party in 2004 over her opposition to same-sex marriage legislation. She was the first Black Canadia…

Bryden, Liberal MP for Ancaster-Dundas-Flamborough-Aldershot, crossed to the newly formed Conservative Party in 2004, disagreeing with Liberal policies.

Keith Martin

2004Notable

Canadian 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…

Pierre Brien

2003

Bloc Québécois → IndependentMPQuebec

0/5

Brien, Bloc Québécois MP for Témiscamingue, left the BQ to sit as an independent, expressing waning interest in the sovereignist cause.

Angela Vautour

1999Notable

NDP → Prog. ConservativeMPNew Brunswick

0/5

One of the most dramatic ideological shifts - from the left-wing NDP all the way to the right-wing Progressive Conservatives.

Cullen, Ontario Liberal MPP for Ottawa West, left the Liberals to join the Ontario NDP, citing disagreements over the party's direction on social policy.

Holden represented English-speaking Westmount in a party that fought for English language rights. He crossed to the Parti Québécois - a French-first, pro-independence party. It …

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

Lupusella, Ontario NDP MPP for Dovercourt, left the NDP to join the Ontario Liberals alongside David Ramsay.

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…

Paul Hellyer

1972

Independent → Progressive ConservativeMPOntario

0/5

After leaving the Liberals to sit as an independent in 1971, Hellyer joined the Progressive Conservatives in 1972, hoping to run for the PC leadership.

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.

Paul Hellyer

1971Notable

Liberal → IndependentMPOntario

0/5

Hellyer left the Liberals, tried to start his own party, joined the Conservatives, then went back to the Liberals, then started another party. He crossed the floor more times th…

Ryan, Liberal MP for Toronto Spadina, crossed to the Progressive Conservatives over policy disagreements with the Trudeau government.

Robert N. Thompson

1968

Social 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.