Carney’s transformation from policy wonk to prime minister owes much to Trump and his tariffs. But the biggest source of Carney’s political strength may become his undoing.

Tired of the president's coercive tactics, the Canadian prime minister puts his country's economy on the line

Canadian Prime Minister Mark Carney is more seasoned as a banker than a politician but has shown a confident touch in standing up to US President Donald Trump and navigating a…