Economic Impacts on the United States. The US impact is smaller in relative terms. Canada accounts for a large but not dominant share of US trade, and the newest 50% tariffs cover only ~5% of US goods imports from Canada. Broader existing tariffs have already raised some input costs (steel, aluminum, autos). Analyses suggest limited additional inflation pressure from the latest round because of the narrow product scope, though US households have already faced higher prices from earlier 2025 measures. US exporters of steel, aluminum, dairy, appliances, agricultural equipment, electronics, furniture, and apparel face Canada’s matching tariffs and potential market share loss. Integrated auto and energy supply chains mean higher costs and possible production shifts. A complete USMCA collapse would be more damaging—Oxford Economics projects US GDP losses in the hundreds of billions and over 200,000 jobs versus a successful deal. US consumers of Canadian lumber, paper, furniture, and certain foods/beverages will pay more. Energy and potash flows have been largely shielded so far.