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In Canadian politics, a '''leadership convention''' is held by a political party when the party needs to hold an election for leader due to a vacancy or a serious challenge to the incumbent leader. Unlike in the United States, where political conventions are held every four years to choose the party's presidential nominee, in Canada the leader of a party remains that party's de facto candidate for Prime Minister until such time as he or she quits or is dismissed by the party. Due to the implementation of "one member one vote" (OMOV) systems and proportional delegate elections by most parties, conventions have declined in importance. In recent years, the result of the vote is either known before the convention or the voting does not take place at the venue. The Liberal Party of Canada held the first leadership convention in 1919, electing William Lyon Mackenzie King. Prior to that the leader of the party was chosen by caucus. The Conservative Party followed suit, using a leadership convention to select R.B. Bennett as party leader in 1927. The Parti Qu�b�cois was the first political party in Canada to adopt an OMOV system. Most provincial and federal parties adopted forms of OMOV in the 1990s. Until 2003, when it adopted an OMOV system, every biennial convention of the Cooperative Commonwealth Federation and its successor, the New Democratic Party of Canada, in the twentieth century was a leadership convention. However, in practice, contested elections were only held in the NDP when there was a declared leadership race. Both the Conservatives and the NDP have instituted one member one vote systems in recent years. The NDP has a modified system where the vote is calculated, so that ballots cast by labour delegates have 25% weight in the total result while votes cast by party members have 75%. The Conservatives have adopted the Progressive Conservative system of OMOV, where each riding has equal weight in a point system. The Reform Party of Canada and Canadian Alliance had pure OMOV systems. The Liberals retain the delegate system, but have adopted a system where delegates in a riding are apportioned by proportional representation. The Bloc Qu�b�cois uses a pure OMOV system. ==See also== *Liberal leadership conventions (federal) *NDP_leadership_conventions (federal) *Bloc Qu�b�cois leadership elections (federal) *Canadian Alliance leadership elections (federal) *Progressive Conservative leadership conventions (federal) *2004 Conservative Party of Canada leadership race (federal) *Ontario Liberal Leadership Conventions *Ontario Progressive Conservative leadership conventions *Ontario CCF/NDP Leadership Conventions *British Columbia Social Credit Party Leadership Conventions *British Columbia Liberal Party Leadership Conventions *Saskatchewan New Democratic Party leadership conventions == Recent conventions == Most of the major parties have held conventions recently to choose new leaders: The new Conservative Party of Canada chose former Canadian Alliance leader Stephen Harper as its new leader on March 20, 2004. The other candidates were former Ontario Health Minister Tony Clement and former Magna International CEO Belinda Stronach. The Liberals chose Paul Martin as leader on November 14, 2003. As his party controlled a majority in the Canadian House of Commons he was called upon to form a government by the Governor General. Martin was sworn-in as Canada's 21st Prime Minister on December 12, 2003. The Progressive Conservatives chose Peter MacKay as leader on May 31, 2003. The New Democrats chose Jack Layton as leader on January 25, 2003. The Canadian Alliance chose Stephen Harper as leader on March 20, 2002. He was elected to parliament in a by-election on May 13, 2002 and became leader of the opposition on May 21, 2002. == Related links == * List of Leadership Conventions (Parliament of Canada site)