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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.
11 crossings
Jenica Atwin
2021NotableGreen Party → LiberalMPNew Brunswick
2/5
Atwin left the Green Party during a period of internal chaos, partly over how leader Annamie Paul handled the Israel-Palestine debate. The Green Party was tearing itself apart.
Party in Crisis
KL
Kelly Lamrock
2013Liberal → New Democratic PartyMLANew Brunswick
0/5
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…
Changed Beliefs
JM
Joan MacAlpine-Stiles and Wally Stiles
2007NotableProgressive Conservative → LiberalMLANew Brunswick
1/5
MacAlpine-Stiles and Stiles, married New Brunswick PC MLAs, both crossed the floor to join the governing Liberals of Shawn Graham.
Switched Sides
FB
Frank Branch
2006Liberal → IndependentMLANew Brunswick
0/5
Branch, New Brunswick Liberal MLA for Nepisiguit, left the Liberal caucus to sit as an independent over policy disagreements with the government.
Stood on Principle
MM
Michael Malley
2006Progressive Conservative → IndependentMLANew Brunswick
0/5
Malley, New Brunswick PC MLA, left the PC caucus to sit as an independent following disputes with the party leadership.
Fought Their Leader
JH
John Herron
2004Progressive Conservative → IndependentMPNew Brunswick
0/5
John Herron, a Progressive Conservative MP for Fundy—Royal since 1997, was one of the last three sitting PC MPs to refuse to join the new Conservative Party of Canada when it wa…
Stood on Principle
Angela Vautour
1999NotableNDP → 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.
Changed Beliefs
Frank Broadstreet Carvell
1917NotableLiberal → Liberal-UnionistMPNew Brunswick
4/5
Like Fielding, Carvell supported conscription during WWI and left the Liberals to join the Union Government.
War & ConscriptionGot Cabinet
John Costigan
1900NotableLiberal-Conservative → LiberalMPNew Brunswick
3/5
John Costigan had served as a Conservative MP for over 30 years and had been a cabinet minister under four Conservative prime ministers — John A. Macdonald, John Abbott, John Th…
Changed Beliefs
James Domville
1896Conservative → LiberalMPNew Brunswick
4/5
James Domville, a Conservative MP from Kings County, New Brunswick, and former militia colonel, switched to the Liberal Party around 1896 as the Conservative coalition showed si…
Switched Sides
AR
Andrew Rainsford Wetmore
1866NotableAnti-Confederate → Confederation PartyMLANew Brunswick
4/5
Wetmore, an Anti-Confederate in the New Brunswick colonial legislature, switched sides and supported Confederation after the pro-Confederation forces prevailed.
Party DissolvedGot Cabinet