The circumstances of US/Canadian trade should be common knowledge by now, but the details often get mired in the swamp of political rhetoric. When Canadian Prime Minister Mark Carney describes the tariff issue as the US "waging war" on Canada, he knows exactly what he's doing. Carney has turned a simple trade issue over reasonable 10% tariffs into an existential crisis, an invasion, an ethnic cleansing, a last stand against "evil" imperialists.