Canadian Prime Minister Mark Carney is on the verge of securing a majority government as special elections are held in three districts on Monday.Votes are being cast in the Toronto-area districts of Scarborough Southwest and University-Rosedale, which are considered safe seats for Carney’s Liberals, and in the Montreal-area district of Terrebonne, which is considered a toss-up.Winning just one of them would give Carney a majority.The Liberals now have 171 members of Parliament in the House of...