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 PCs, led provincially by Robert Stanfield, swept to a surprise victory. Mulroney became a youth delegate and attended the 1956 leadership convention in Ottawa. While initially undecided, Mulroney was captivated by John Diefenbaker's powerful oratory and easy approachability. Mulroney joined the "Youth for Diefenbaker" committee which was led by Ted Rogers, a future scion of Canadian business. Mulroney struck an early friendship with Diefenbaker (who won the leadership) and received telephone calls from him. Mulroney won several public speaking contests at St. Francis Xavier University, was a star member of the school's debating team, and never lost an interuniversity debate.