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Issue:Conscription Crisis of 1917. (The election was supposed to be held in 1916, but due to the emergency of the First World War, the government postponed the election, largely in hope that a coalition government could be formed, as was the case in the United Kingdom.)
Result: Prime Minister Robert Borden's Unionists, an alliance of pro-conscription politicians, increase their majority. The vote in Canada is heavily divided along anglophone and francophone lines.
Reason: Newly elected Liberal leader Lester Pearson made a speech demanding that the Progressive Conservatives hand back power without an election because of the recent economic decline. Diefenbaker responded by revealing a formerly classified Liberal file that predicted the economic malaise, so the "arrogant" label that had attached to Liberals in 1957 stayed. Also, the resignation of Louis St. Laurent had also left Quebec with no favourite son leader and the Progressive Conservatives were also able to harness the powerful political machine of the provincial Union Nationale, despite Diefenbaker's poor command of French. The Progressive Conservatives thus hoped to obtain a majority government.
Reason: Counting on a boost from his successful rescue of the 1976 Summer Olympics in Montreal after cost overruns and construction delays by the Montreal municipal government, Liberal Premier Robert Bourassa called an early election well before the five-year maximum term ended.
Result: The separatist Parti Québécois, led by René Lévesque, defeated the incumbent Liberals in a landslide to form government for the first time and set the stage for the 1980 Quebec referendum. The once-powerful Union Nationale (Quebec) made a modest comeback, winning 11 seats under Rodrigue Biron, and for the first time won significant support from some anglophone voters. Bourassa lost his seat and resigned as Liberal leader to pursue an academic career, before leading the Liberals back to power in 1985.
Reason: Newly minted Liberal leader John Turner was persuaded by internal polls that he was well ahead of the opposition. He also wanted to present a "new" party, different from his predecessor Pierre Trudeau. Turner did not have a seat in the Commons, and his election call was just four days after being sworn in. However, the Liberals had been elected in 1980 and Turner would constitutionally be allowed to wait until 1985 to call an election.
Result: Turner's 200 patronage appointments, mostly on the recommendation of Trudeau, nullified attempts to distance himself from Trudeau's policies and practices. The Liberal's Quebec stronghold was also nullified as Progressive Conservative leader Brian Mulroney was a native of that province. The Progressive Conservatives win the largest majority ever at the federal level, while the Liberals end up with 40 seats, only ten more than the NDP's 30.
Reason: Favourable opinion polls, as the ruling Liberals are still above the 50% mark. PremierDavid Peterson allegedly wanted to call an election before the full effects of the looming recession could be felt. Some within his party oppose the early election call (they had won a huge majority in 1987).
Result: The Liberals are beset by controversies and scandals right after the campaign started, with unions and interest groups expressing their cynicism about the snap election. Bob Rae's NDP managed an electoral upset, slightly outpolling the Liberals in the popular vote but winning enough seats for a majority. Peterson loses his own seat and resigns the party leadership.
Reason: Favourable opinion polls. Some government MPs opposed the snap election, as cleanup from the devastating Red River Flood was still underway. This was also the second shortest majority mandate in Canadian history, after Laurier's 1908–1911 term.
Result:Jean Chrétien's Liberals barely retain their majority. The NDP and Progressive Conservatives win enough seats, mainly at the expense of the Liberals in the Atlantic provinces, to regain official party status.
Reason: Prime Minister Jean Chrétien planned to call an election before the newly formed Canadian Alliance could consolidate itself outside of its western Canadian base. The call was also to take advantage of newly elected leader Stockwell Day's lack of experience as a federal politician. (Day also dared Chrétien to call an election.)
Result: In a campaign lacking important issues and record low turnout, Chrétien's Liberals were re-elected with an increased majority, taking back seats in Atlantic Canada that they lost to the NDP and Progressive Conservatives in the previous election.
Reason: In 2007, Parliament passed a law fixing federal election dates every four years and scheduling the next election date as October 19, 2009, but the law did not (and could not without a Constitutional Amendment) limit the powers of the governor general to dissolve Parliament at any time, such as when opposition parties bring down the government on a vote of confidence. In this election there was no loss of a non-confidence vote, but the prime minister asked the governor general to call an election. The governor general granted the prime minister's request. Stephen Harper hinted at the possibility of dissolving parliament on August 14, 2008. Speaking in Newfoundland and Labrador, he cited Stéphane Dion as the main player in making Parliament become increasingly "dysfunctional". "I'm going to have to make a judgment in the next little while as to whether or not this Parliament can function productively," Harper said. This came after repeated confidence votes that resulted in the NDP and Bloc parties not voting in favour of the government, and the Liberal Party voting in favour or not attending the vote. Rumours of a possible fall election were further fuelled by Harper's announcement of a fourth federal by-election for September 22 in the Toronto riding of Don Valley West.
Reason: In the previous election of 2007, Premier Jean Charest's Liberals were re-elected but only as a minority government. The election was called, claiming the need for a mandate to deal with the 2007–2008 financial crisis.
Reason: Faced with student protests and corruption allegations, Liberal Premier Jean Charest called a snap election to seek a fourth consecutive mandate, pitting the Liberals against Pauline Marois's Parti Québécois a second time.
Result:Pauline Marois's Parti Québécois is elected to form a minority government, with a massive decline in the Liberals' vote and Premier Charest losing his seat. The Coalition Avenir Québec, in its first electoral test, came in third place but coming close to beating the Liberals' in the popular vote.
Reason: Premier Pauline Marois's Parti Québécois sought a majority government having won government in 2012 in minority. Marois called an election due to favourable opinion polls and facing imminent defeat on the 2014-15 provincial budget.
Result: The Quebec Liberal Party under Philippe Couillard won a majority government defeating the incumbent Parti Québécois government, becoming the first single-term government since 1970. It marked the lowest seat total for the Parti Québécois since 1989 and its smallest share of the popular vote since 1970, with Pauline Marois losing her own riding. The Coalition Avenir Québec under François Legault made minor gains in terms of seats despite receiving a smaller share of the popular vote than in the 2012 election.
Reason: The Ontario New Democrats announced that they would not support the minority Liberal government's budget. Facing certain defeat on the budget in the Legislative Assembly, Premier Kathleen Wynne called an election before the eventual budget vote.
Result: The Liberals regained majority government, Progressive Conservative leader Tim Hudak resigned after losing a second election, while the NDP remained in third place.
Reason: Premier Jim Prentice called for an election on April 7, 2015, a year earlier than expected, because he "needed a mandate to implement a tough budget" that proposed higher taxes, fees, and cuts in government spending.
Result:Rachel Notley, representing the NDP, won a majority government, the first Alberta government in that party's history, ending the Progressive Conservative's 43-year reign in government. The Wildrose Party became the official opposition, while the Progressive Conservatives went down to 10 seats, their worst defeat since the 1967 election. The Wildrose and Progressive Conservative parties would subsequently merge, creating the United Conservative Party.
Reason: Premier Brian Pallister called an election just over a year ahead of schedule, citing a need to seek a new mandate to continue implementing the government's platform for Manitoba. The election was called for September 10, 2019, just one day before the writs were issued for the 2019 Canadian federal election.
Reason: Premier Blaine Higgs called an election for September 14, 2020, saying stability was required for the next phase of the COVID-19 pandemic and economic recovery. At the time, Higgs led a minority government.
Reason: Premier John Horgan had led a minority government under a confidence and supply agreement with the Green Party of British Columbia, due to expire in June 2021. He called an election for October 24, 2020, to avoid creating "uncertainty and instability" in a minority government situation during the COVID-19 pandemic, which he said he expected to last well into the next year.
Result: The NDP won a majority government with 57 out of 87 seats and 47.7% of the popular vote.
Reason: Prime Minister Justin Trudeau called an election more than 2 years ahead of schedule, framing the election as a decision on political parties' post-Covid-19 policies. However, most of the media and voters interpreted the election as Trudeau's quest to recapture a Liberal majority government, while capitalizing on strong polling and his government’s record in handling the health and economic crises of the pandemic.
Reason: Premier Dennis King called an election 6 months ahead of schedule.
Result: The Progressive Conservatives are re-elected with a majority government, winning 22 out of 27 seats at 55.92% of the popular vote.
Notes
At the time, Pearson's demand was not seen to be as unreasonable as it would be today, and appeared as though it could be backed by more than the threat of a backlash among the voters. Barely three decades had passed since the King-Byng Affair, when then-Prime Minister William Lyon Mackenzie King was compelled by then-Governor General Julian Byng to resign when Byng would not grant a dissolution of parliament. Pearson may have believed that the governor general then in office (Vincent Massey, who had been appointed under Louis St. Laurent) would cite that precedent if Diefenbaker requested a dissolution only nine months after the last election. Massey's granting of Diefenbaker's request for a dissolution entrenched the constitutional convention that the Sovereign's representative would never refuse a request for dissolution.
