Four months since Trump fired the opening salvo of his trade war, only China and Canada have dared to hit back at Washington imposing a minimum 10 per cent global tariff, 50 per cent levies on steel and aluminium, and 25 per cent on autos.

Trump threatened to escalate tariffs beyond 35% if Canada opts to retaliate with tariffs on U.S. goods. Canadian goods are also subject to sector-specific tariffs, such as 50% levies on steel and aluminum as well as 25% tariffs on non-USMCA compliant autos and auto parts.

President Donald Trump said the U.S. will impose a 35% tariff on all Canadian goods from Aug. 1 and threatened a blanket 15 to 20% levy on most other nations.