Canadian Prime Minister Justin Trudeau faces the biggest test of his political career after Finance Minister Chrystia Freeland, long one of his most powerful and loyal ministers, announced Monday that she was resigning from the Cabinet. It was a move that stunned the country and raised questions about how much longer the unpopular Trudeau can stay in his job. Freeland, who was also deputy prime minister, said that Trudeau had told her Friday that he no longer wanted her to serve...