Caroline Mulroney 12 years until 2005 when she returned to Canada, worked in financial services and became involved in charitable work. She also served on the board of directors of the Windsor–Detroit Bridge Authority. Mulroney is the only daughter and eldest child of the 18th Prime Minister of Canada, Brian Mulroney, and his wife Mila Mulroney. She is also a naturalized citizen of the United States. Mulroney is the eldest of four children and only daughter of former Prime Minister of Canada Brian Mulroney and his wife, Mila. One of her younger brothers is CTV morning host Ben Mulroney. Her father won
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