Berthier—Montcalm, Quebec

At a cocktail party on May 18, 2002, Michel Bellehumeur, Member of Parliament for Berthier—Montcalm, announced his plan to resign from the House of Commons to run for the Parti Québécois in the provincial riding of Joliette, following the resignation of PQ minister Guy Chevrette.^[1]

Lac-Saint-Jean—Saguenay, Quebec

Calgary Southwest, Alberta

Upon his election as leader of the Canadian Alliance, Stephen Harper needed a seat in the House of Commons. Former Reform Party leader Preston Manning resigned his seat to provide a seat for Harper. Harper previously represented the neighbouring riding of Calgary West from 1993–1997, but the seat was already held by MP Rob Anders.

The Liberal Party did not run a candidate against Harper, as a courtesy to allow Harper (as leader of the opposition) to win his seat.

The NDP selected Bill Phipps, a former leader of the United Church, minister and social activist in the city. Phipps challenged Harper's conservative economic and social views. During the campaign, Harper commented he "despise[d]" the cleric , and declined to debate him.

The Green Party chose environmental activist James Kohut, who had previously spoken out in support of the Kyoto Accord and against government subsidies for oil companies, while also calling for lower gas prices for consumers (Calgary Herald, 23 December 2001).

Gordon Barrett, a former candidate for the Social Credit Party of Alberta in Sherwood Park, ran in the riding as an independent.

The leader of the Christian Heritage Party, Ron Gray, was parachuted into the riding in an attempt to win a seat for the CHP in the House of Commons.

Saint Boniface, Manitoba

Bonavista—Trinity—Conception, Newfoundland and Labrador

Gander—Grand Falls, Newfoundland and Labrador

Windsor West, Ontario

The Right Honourable Herb Gray had represented the Windsor-Essex area for nearly forty years when he retired in 2002 to accept a job as Canadian Chair of the International Joint Commission. A by-election was scheduled for May 22, 2002.

The incumbent Liberals chose Richard Pollock, a local lawyer and Liberal organizer, having worked on federal and provincial campaigns in Windsor since 1979. He also served on the executive of the Windsor West Provincial Liberal Association, was the area organizer for the Essex Windsor Liberal Association and worked on Jean Chretien's leadership campaign in 1990.^[2]

The NDP chose Brian Masse, a municipal politician in Windsor's city council.

The Progressive Conservative Party chose Ian West, who had run against Gray in the previous election. The Canadian Alliance chose Rick Fuschi, an employee in the auto industry.

Chris Holt represented the Green Party and the Christian Heritage Party chose Allan James, a chemical engineer.

Saint-Léonard—Saint-Michel, Quebec

Verdun—Saint-Henri—Saint-Paul—Pointe-Saint-Charles, Quebec

Perth—Middlesex, Ontario

In the 2000 election, Liberal John Richardson was re-elected in the riding of Perth—Middlesex, defeating his rival, Progressive Conservative Gary Schellenberger by approximately 5,000 votes. Schellenberger had run against Richardson in 1997, and had received about 25% of the vote.^[3] During the 2000 election campaign, rumours about Richardson's health began to come out, specifically after he missed four all-candidates meetings during the election. He barely campaigned in the 1997 election due to what was thought to be a serious medical condition.^[4]

Eventually, Richardson resigned his seat on October 11, 2002, citing personal reasons.^[4][5] It would be revealed years later that Richardson suffered from Alzheimer's Disease.^[6]

The resulting by-election was scheduled for May 21, 2003. Gary Schellenberger again ran for the Progressive Conservatives, with the NDP choosing their candidate in the 2000 election, Sam DiNicol to run again.^[3] The Liberal party chose farmer and educator Brian Innes, while the Canadian Alliance chose businesswoman Marian Meinen. The Leader of the Christian Heritage Party, Ron Gray, was a parachute candidate in the by-election, in an attempt to give his party representation in parliament.

Lévis-et-Chutes-de-la-Chaudière, Quebec

Antoine Dubé, Bloc Québécois MP since 1993, resigned his seat on March 17, 2003 to run in the 2003 Quebec provincial election as a Parti Québécois candidate in Chutes-de-la-Chaudière. That election, held April 14, 2003, was won by Marc Picard.

Prime Minister Chrétien scheduled this by-election, as well as the Témiscamingue by-election, for June 16, 2003.

The Bloc Québécois chose Maxime Frechette, former parliamentary assistant to Antoine Dubé and former alderman for the city of Saint-Nicolas.^[8] The Liberal Party chose accountant Christian Jobin, the NDP chose social worker Louise Foisy from Lévis, the Progressive Conservatives chose law student and security guard Yohan Nolet from Saint-Nicolas, the Green Party chose industrial entrepreneur Yonnel Bonaventure from Quebec City, the Canadian Alliance chose Philippe Bouchard, a designer from Quebec City and the Marijuana Party chose Benjamin Kasapoglu, a salesperson from Quebec City^[9]

Témiscamingue, Quebec

Pierre Brien of the Bloc Québécois, who, like his colleague Antoine Dubé, was elected in 1993, also decided to run in the 2003 Quebec provincial election. Unlike Dubé, however, Brien decided to run as a member of Action démocratique du Québec. In order to do this, he left the Bloc Québécois to sit as an independent before resigning on March 14, 2003. Brien ran as the ADQ's candidate in Rouyn-Noranda–Témiscamingue, losing to Liberal candidate Daniel Bernard.