In the 2015 federal election, Harper won his seat of Calgary Heritage but overall the Conservative Party lost power following nearly a decade of governance. Harper continued to serve as prime minister until November 4, 2015, when Justin Trudeau and a Liberal Party of Canada government was officially sworn in. Harper officially stepped down as party leader on October 19, 2015, and Rona Ambrose was subsequently chosen as interim leader on November 5, 2015. On May 26, 2016 he was named as a senior board member for the Conservative Party Fund. After 2015, Harper slowly began to step away from Canadian politics and took on a number of international business and leadership roles, founding a global consulting firm, appearing on US and British media, and being elected leader of the International Democrat Union. In 2017, Andrew Scheer, a former House of Commons speaker, was elected as Harper's successor as leader of the Conservative Party.