Brian Mulroney supporting the merger at a time when former PC leaders Joe Clark, Jean Charest and Kim Campbell either opposed it or expressed ambivalence. Military historians Norman Hillmer and J.L. Granatstein ranked Mulroney eighth among Canada's prime ministers in their 1999 book "Prime Ministers: Ranking Canada's Leaders". On March 31, 2009 it was reported by various news outlets that a Conservative official claimed Mulroney was no longer a member of the party. They claimed his membership expired in 2006 and was not renewed. Additionally, Mulroney allegedly "called a senior party official two months ago to ask that his name be pulled
Brian Mulroney on Diefenbaker's leadership. Diefenbaker had reached his 70th birthday in 1965. Mulroney joined with most of his generation in supporting Camp and opposing Diefenbaker, but due to his past friendship with Diefenbaker, he attempted to stay out of the spotlight. With Camp's narrow victory, Diefenbaker called for a 1967 leadership convention in Toronto. Mulroney joined with Joe Clark and others in supporting former Justice minister E. Davie Fulton. Once Fulton dropped off the ballot, Mulroney helped in swinging most of his organization over to Robert Stanfield, who won. Mulroney, then 28, would soon become a chief adviser to the new