Prime Minister of Canada has granted former prime ministers an augmentation of honour on the personal coat of arms of those who pursued them. The heraldic badge, referred to by the CHA as the "mark of the Prime Ministership of Canada", consists of four red maple leaves joined at the stem on a white field ("Argent four maple leaves conjoined in cross at the stem Gules"); the augmentation has, so far, been granted either as a canton sinister or centred in the chief. To date, former prime ministers Joe Clark, Pierre Trudeau, John Turner, Brian Mulroney, Kim Campbell and Jean Chrétien were granted arms
Brian Mulroney in 1988. The Stanfield-led Progressive Conservatives lost the 1974 election to the Pierre Trudeau-led Liberals, leading to Stanfield's resignation as leader. Mulroney, despite never having run for elected office, entered the contest to replace him. Mulroney and provincial rival Claude Wagner were both seen as potentially able to improve the party's standing in Quebec, which had supported the federal Liberals for decades. Mulroney had played the lead role in recruiting Wagner to the PC party a few years earlier, and the two wound up as rivals for Quebec delegates, most of whom were snared by Wagner, who even blocked Mulroney