Industrial Policy & Trade Monitor· 2662 actions· ✨ 89 recent

On 9 September 2026 President Trump signed five proclamations under Section 338 of the Tariff Act of 1930 responding to Canada's 8 September 2026 retaliatory tariffs on roughly $20bn of US exports (steel, dairy, agricultural equipment). The proclamations impose outright import bans on certain Canadian alcoholic-beverage and dairy products that had been subject to the 50% Section 338 duties imposed 22 August 2026 (following Canada's continued discrimination against US alcohol and dairy commerce), and separately exclude certain Canadian motor-vehicle-sector products from importation for the same reason. The proclamations also modify the product scope of the July 20, 2026 Section 338 tariff actions, removing items such as rock salt and cement and adding others, including all-terrain vehicles and additional dairy products. The import bans take effect 29 September 2026; the product-list modifications take effect 15 September 2026. The duties/bans apply regardless of USMCA origin and stack on top of Section 232 tariffs.

Canada's Department of Finance published an updated list of over 700 US-origin products subject to counter-tariffs effective 2026-09-08, covering CA$27.6 billion of US imports across steel, aluminium, dairy, appliances, agricultural equipment, pulp/paper and electronics. Rates (15%, 25% or 50% depending on product) are matched dollar-for-dollar to the corresponding US Section 338/232 tariffs on the same goods, explicitly countering the United States' 22 August 2026 decision to impose a 50% tariff on CA$27.6 billion of Canadian goods. Steel and aluminium flat-rolled products carry the top 50% counter-rate.