Harper Era

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…

Branch, New Brunswick Liberal MLA for Nepisiguit, left the Liberal caucus to sit as an independent over policy disagreements with the government.

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

William David "Bill" Casey, the Conservative MP for Cumberland—Colchester—Musquodoboit Valley in Nova Scotia, was expelled from the Conservative caucus on June 6, 2007, after vo…

Turner was expelled from the Conservative caucus in October 2006 for publicly criticizing the party. After sitting as an independent, he joined the Liberals in February 2007.

MacAlpine-Stiles and Stiles, married New Brunswick PC MLAs, both crossed the floor to join the governing Liberals of Shawn Graham.

Joseph R. "Joe" Comuzzi, a Liberal MP from Thunder Bay—Superior North since 1988, was suspended from the Liberal caucus in March 2007 after voting in favour of the Harper Conser…

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…

Peterson, Ontario Liberal MPP for Mississauga South, left the Liberals in March 2007 over policy disagreements and joined the PCs in June 2007.

Khan, Liberal MP for Mississauga-Streetsville, crossed to the Conservatives in January 2007 after Prime Minister Harper appointed him as special adviser on Middle East and South…

Wilson had resigned from the Liberal caucus over allegations about his finances. He then joined the Green Party, becoming their first-ever Member of Parliament.

Riedl and Auger, Quebec ADQ MNAs, crossed the floor to join the governing Quebec Liberals under Jean Charest as the ADQ declined.

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.

Lekstrom, BC Liberal MLA for Peace River South and former cabinet minister, left the BC Liberal caucus to protest the party's implementation of the Harmonized Sales Tax (HST).

Boutilier, Alberta PC MLA for Fort McMurray-Wood Buffalo, was ejected from the PC caucus in 2009 for publicly criticizing the government's response to the oilsands housing crisi…

Forsyth, a long-serving PC MLA and former cabinet minister, crossed to the Wildrose Alliance with Rob Anderson over dissatisfaction with PC governance.

Anderson, PC MLA for Airdrie-Chestermere, crossed to the Wildrose Alliance along with Heather Forsyth, citing overspending, broken promises, and democratic reform.

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…

Pastoor, Alberta Liberal MLA for Lethbridge-East, left the Liberals and crossed to the PCs under new leader Alison Redford, who she felt represented a more progressive direction.

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

Hyer, NDP MP for Thunder Bay-Superior North, left the NDP in 2012 over the party's whipped vote on the long-gun registry. He sat as an independent before joining the Greens in 2…

Rebello, PQ MNA for La Prairie, left the PQ to join the Coalition Avenir Québec, citing the CAQ's pragmatic approach as more appealing than the PQ's sovereignty focus.

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

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…

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

Rathgeber was a Conservative backbencher who became increasingly frustrated with Stephen Harper's tight control over MPs. He felt MPs were being treated as rubber stamps rather …

Del Mastro had been one of PM Harper's closest allies - his parliamentary secretary. He left caucus after being charged by Elections Canada with overspending on his campaign and…

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…

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.

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.

Perry, PEI PC MLA for Tignish-Palmer Road, left the PCs and joined the governing PEI Liberals.

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…

Hassainia disagreed with NDP leader Thomas Mulcair's position on the Israeli-Palestinian conflict. She left the party over it.

In one of the biggest floor crossings in Canadian history, Wildrose Party LEADER Danielle Smith led 9 of her MLAs across the floor to join the governing Progressive Conservative…

Bellavance, BQ MP for Richmond-Arthabaska since 2004, left the Bloc to sit as an independent, expressing disillusionment with the party's direction.

On December 17, 2014, Wildrose Party leader Danielle Smith led nine of the party's seventeen MLAs across the floor of the Alberta Legislature to join the governing Progressive C…

Donovan, Wildrose MLA for Little Bow, crossed to the PCs in November 2014 alongside Kerry Towle.

Fortin left the BQ to co-found the Strength in Democracy (Force et Démocratie) party with Jean-François Larose, seeking a new approach to Quebec nationalism.

Larose, NDP MP for Repentigny, left the NDP to co-found the Strength in Democracy (Force et Démocratie) party with Jean-François Fortin.

Towle, Wildrose MLA for Innisfail-Sylvan Lake, crossed to the PCs in November 2014, weeks before Danielle Smith's mass crossing. She was unhappy with Smith's leadership.

Lane, PC MHA for Mount Pearl South, crossed to the Liberals in 2014 ahead of the anticipated Liberal wave.

Adams, Conservative MP for Mississauga-Brampton South, crossed to the Liberals in February 2015 after being denied a Conservative nomination. She was personally welcomed by Just…