Canada’s Justin Trudeau era is coming to an end. The three-term prime minister announced Monday morning that he plans to step down as prime minister and as party leader once the Liberals choose his successor. Trudeau told Canadians in a televised address that although he prides himself on being a fighter, he will step aside because of the divisiveness and polarization around his leadership — including inside his own caucus. “This country deserves a real choice in the next election, and...