It’s common for U.S. politicians to tie their opponents to an unpopular incumbent president, but this year in Canada, Mark Carney took it international. Unlike in the U.S., Canadian politics is multiparty and often defined by issues without salience to its neighbors to the south.

The election was dominated by Mr. Trump and his relentless focus on Canada. Pierre Poilievre, the opposition leader, lost the seat he had held for 20 years.

Prime Minister Mark Carney will be watched closely by Canadians infuriated by Donald Trump — and by an anxious business community looking for tariff relief — when he meets with the U.S. president Tuesday in Washington.