All Floor Crossings

St-Jacques joined the Liberal Party along with other Quebec PC MPs who were unhappy with the party's direction.

Réjean Lefebvre, a Bloc Québécois MP, left the party caucus in January 1999 following personal disputes with the party leadership. Lefebvre had been elected in the 1993 BQ sweep…

Bernard St-Laurent, a Bloc Québécois MP for Manicouagan, broke with the party in March 1997 following internal disputes with the BQ leadership. St-Laurent had been elected in th…

Denis Pronovost, a Progressive Conservative MP from Quebec, left the Conservative caucus in June 1993 as the Mulroney government was in its death throes. Pronovost was part of t…

Gilles Bernier, a Progressive Conservative MP for Beauce since 1984, was a colourful Quebec politician who ran as an Independent in the October 1993 election after being denied …

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 …

Tremblay was a PC MP who left to join the new Bloc Québécois movement.

François Gérin, a Progressive Conservative MP for Mégantic—Compton—Stanstead, was among the first Quebec MPs to break with Brian Mulroney over the failure of the Meech Lake Acco…

Chartrand was among the PC MPs who followed Lucien Bouchard to form the Bloc Québécois after the Meech Lake Accord failure.

Gilles Duceppe

1990Notable

Independent → Bloc QuébécoisMPQuebec

5/5

Gilles Duceppe made history on August 13, 1990, when he won the by-election in Laurier—Sainte-Marie as an Independent sovereigntist — the first explicitly pro-sovereignty candid…

Rocheleau was one of the Liberal MPs who left to co-found the Bloc Québécois after the Meech Lake Accord failed.

Jean Lapierre

1990Notable

Liberal → Bloc QuébécoisMPQuebec

2/5

Lapierre left the Liberals to co-found the Bloc Québécois with Lucien Bouchard after the failure of the Meech Lake Accord, driven by Quebec nationalist sentiment.

Louis Plamondon, a Progressive Conservative MP for Richelieu since 1984, left the Conservative caucus in June 1990 in the wake of the Meech Lake crisis and joined the nascent Bl…

Lucien Bouchard

1990Notable

Prog. Conservative → Bloc QuébécoisMPQuebec

2/5

Bouchard was a cabinet minister under PM Mulroney. When the Meech Lake Accord (a constitutional deal meant to bring Quebec into the constitution) failed, Bouchard left the party…

Leblanc was a PC MP who joined the Bloc Québécois as a founding member after the collapse of the Meech Lake Accord.

Venne left the PC caucus to join the Bloc Québécois as a founding member, motivated by Quebec sovereignty.

Richard Grisé, a Progressive Conservative MP from Quebec's Chambly riding, was effectively expelled from the PC caucus in April 1989 over personal conduct issues that made his c…

Donald James Johnston

1988Notable

Liberal → Independent LiberalMPQuebec

1/5

Donald Johnston, a prominent Montreal Liberal MP and former cabinet minister under Pierre Trudeau and John Turner, broke with the Liberal Party in January 1988 over his vehement…

Suzanne Blais-Grenier was a Quebec Progressive Conservative MP who had served as Minister of State for the Environment in Brian Mulroney's first cabinet — the first woman to hol…

Toupin left the Conservatives, tried to join the Liberals - but the Liberals said no. He briefly joined the NDP, then sat alone as an independent.

Richard Janelle, one of the last Social Credit MPs, crossed the floor to join the Progressive Conservative Party in 1979 as it became clear that Social Credit had no future in f…

René Matte, one of the last remaining Créditiste MPs in the House of Commons, was expelled from what remained of the Social Credit/Créditiste caucus in 1978. By this point, the …

Gilbert Rondeau, a Créditiste/Social Credit MP from Quebec, was expelled from the Social Credit caucus around 1977 during the death throes of the Social Credit movement in feder…

Jacques Lavoie, a Progressive Conservative MP from Quebec, crossed the floor to join the Liberal Party in 1977. His switch came during a period of intense political flux in Queb…