Canadian Prime Minister Justin Trudeau’s Liberal party has suffered a major upset in a special election for a Toronto district it has held for three decades, raising doubts about Trudeau’s leadership ahead of next year’s general election. Elections Canada reported Tuesday that opposition Conservative candidate Don Stewart won the Toronto-St. Paul’s district by almost 600 votes, 42.1% over the Liberal candidate’s 40.5% with all 192 polling stations reporting results of Monday’s voting. “...