Canadian Prime Minister Justin Trudeau is facing the biggest test of his political career following the resignation of Finance Minister Chrystia Freeland, long one of his most powerful and loyal ministers.

Prime Minister Justin Trudeau named Dominic LeBlanc as Canada’s finance minister to replace Chrystia Freeland, who shocked the country with a scathing resignation letter that suggested the government is mishandling its preparation for the return of Donald Trump.

Canada's Finance Minister Chrystia Freeland quit on Monday after clashing with Prime Minister Justin Trudeau on issues including how to handle possible U.S. tariffs, dealing a huge blow to an already unpopular government.