Brian Mulroney is a Canadian politician who served as the 18th Prime Minister of Canada from 1984 to 1993, representing the Progressive Conservative Party. He is best known for his significant role in reshaping Canada-US relations and championing free trade agreements, particularly the Canada-US Free Trade Agreement (CUSFTA) and the North American Free Trade Agreement (NAFTA). Mulroney's leadership was marked by efforts to modernize Canada's economy and strengthen ties with its southern neighbor.