 While Clark continued as party leader, his position was challenged by calls for a leadership review which ultimately led to the 1983 leadership convention.MacDonald supported Clark in his campaign to regain the leadership, but Clark lost to Brian Mulroney.MacDonald returned to government after the PC victory in the 1984 federal election, serving first as Minister of Employment and Immigration from 1984 to 1986, and then as Minister of Communications from 1986 to 1988, under Prime Minister Mulroney.