Brian Mulroney Liberals had a large majority due to their previous long tenure in power. Led by Allan MacEachen, the Senate took a very assertive role in legislation, forcing the government to compromise on several points despite its considerable House majority. A major undertaking by Mulroney's government was an attempt to resolve the divisive issue of national unity. Quebec was the only province that did not sign the new Canadian constitution negotiated by Prime Minister Pierre Trudeau in 1982, and Mulroney wanted to include Quebec in a new agreement with the rest of Canada. In 1987, he negotiated the Meech Lake Accord
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