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 he became prime minister in June 1979. By late 1982, Joe Clark's leadership of the Progressive Conservatives was being questioned in many party circles and among many Tory members of Parliament, despite his solid national lead over Prime Minister Pierre Trudeau in opinion polls, which stretched to 19 percent in summer 1982. Mulroney, while publicly endorsing Clark at a press conference in 1982, organized behind the scenes to defeat him at the party's leadership review. Clark's key Quebec organizer Rodrigue Pageau was in fact a double agent, working for Mulroney, undermining Clark's support. When Clark received an endorsement by only