1990 Conservative Party (UK) leadership election 1990 Conservative Party (UK) leadership election The 1990 Conservative Party leadership election in the United Kingdom took place on 20 November 1990 following the decision of Michael Heseltine, former Defence and Environment Secretary, to challenge Margaret Thatcher, the incumbent Prime Minister, for leadership of the Conservative Party. Thatcher failed to win outright under the terms of the election in the first ballot, and was persuaded to withdraw from the second round of voting. She announced her resignation on the morning of 22 November 1990, ending more than 15 years as Conservative leader and 11 years as Prime Minister. Discontent with
1983 Progressive Conservative leadership election 1983 Progressive Conservative leadership election The 1983 Progressive Conservative leadership election was held on June 11, 1983 in Ottawa, Ontario to elect a leader of the Progressive Conservative Party of Canada (PC Party). At the convention, Brian Mulroney was elected leader on the fourth ballot, defeating former Prime Minister Joe Clark. Joe Clark had been leader of the PCs after winning the 1976 leadership convention. While Clark was credited with uniting the PCs after the difficult years under the leadership of Robert Stanfield and leading the party to victory in the 1979 federal election, the opposition defeated his government over