New Delhi, Aug. 25 -- For workers on the assembly lines in Windsor, Ontario - where Ford and Stellantis plants sit a bridge-length from Detroit - the announcement that arrived Monday on Truth Social was not an abstraction. President Donald Trump has chosen to double down on Canada, threatening to idle factories on both sides of the border by imposing the kind of tariffs that no allied government in living memory has absorbed without a political rupture.

a category that previously faced no levy and one that, industry executives warn, is the connective tissue holding North American vehicle production together. The announcement landed after a round of talks between US and Canadian trade representatives ended Saturday without agreement.

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