After nine years under Prime Minister Justin Trudeau, weak investment and slow economic growth had spurred Canadian executives to line up behind Conservative Leader Pierre Poilievre, who has promised to unleash capital with tax cuts and deregulation.

TORONTO -- Mark Carney's political career is only months old, and it's already been a roller-coaster ride. The former central banker appeared destined to become one of Canada's shortest-serving prime ministers until President Donald Trump picked a fight with the U.S.'s northern neighbor.