Canada Hits Back With 50% Dollar-for-Dollar Tariffs as US-Iran Sanctions Threaten to Ensnare China

Prime Minister Mark Carney announced that Canada will impose dollar-for-dollar retaliatory tariffs starting September 8, matching the 50% duties the US applied to roughly $20 billion worth of Canadian products. The Canadian measures will target sectors including steel, dairy, agricultural equipment, and pulp and paper. The Trump administration responded by discussing additional trade penalties against Canada, escalating a dispute Carney has described as putting the two countries effectively at war.

Separately, US Treasury Secretary Scott Bessent unveiled what he called an economic D-Day sanctions package against Iran, warning that any country maintaining economic ties to Tehran faces a defined timeline to cut those ties or face unilateral US action. The measures are aimed squarely at buyers of Iranian oil, with analysts pointing primarily to China. Beijing condemned the sanctions and warned it would retaliate if the US expands secondary sanctions to include Chinese companies, putting China's largest banks in a difficult position: they face pressure from Beijing to defy Washington while still relying heavily on access to the US dollar financial system.