In their backgrounds and political styles, Canadian election front-runners Mark Carney and Pierre Poilievre are a study in contrasts.

Until President Trump won a second term and began threatening Canada's economy and sovereignty, the Liberals looked headed for defeat.

Whatever the case, one thing was clear: Mr. Trump is not giving up on his obsession with Canada, and the new government that emerges from Monday’s vote will need to deal with a leader intent on both hurting Canada’s economy with tariffs, and coveting its vast resources.