1957    John Diefenbaker leads the Progressive Conservative Party of Canada to a stunning upset in the Canadian federal election, 1957, ending 22 years of Liberal Party rule.

1984    Canadian Prime Minister Pierre Trudeau announces he will retire as soon as the Liberals can elect another leader.

2005    First part of the Gomery Report, which discusses allegations of political money manipulation by members of the Liberal Party of Canada, is released in Canada.