2015 Canadian federal election

The 2015 Canadian federal election was held on October 19, 2015, to elect the 338 members of the House of Commons of the 42nd Parliament of Canada. In accordance with the maximum four-year term under a 2007 amendment to the Canada Elections Act, the writs of election for the 2015 election were issued by Governor General David Johnston on August 4. At 11 weeks, the ensuing campaign was one of the longest in Canadian history: It was also the first time since 1979 that a prime minister attempted to remain in office into a fourth consecutive Parliament and the first time since 1980 that someone attempted to win a fourth term of any kind as prime minister. (In both cases, it was Pierre, Justin Trudeau’s father, who attempted in 1979 to win a 4th consecutive term and succeeded in 1980 in winning a fourth term overall.) This is also the most recent election in which a majority government was formed.

The Liberal Party won 184 seats, forming a majority government with its leader Justin Trudeau becoming prime minister. Trudeau and the rest of his cabinet were sworn in on November 4, 2015. The Conservative Party, led by incumbent Prime Minister Stephen Harper, won 99 seats, becoming the Official Opposition after nearly a decade on the government benches. The New Democratic Party, led by Tom Mulcair, won 44 seats, becoming the third-largest party in the House of Commons, after having formed the Official Opposition following the 2011 election. The Bloc Québécois won 10 seats, the Green Party won 1 seat, and Strength in Democracy lost all its seats.