# Trump invokes 1930s tariff law against Canada in unprecedented move US-Canada trade war escalates with automotive sector at the center of tensions. - **Source:** [Fortune | FORTUNE](https://brifing.si/source/769282ef-327a-4454-909a-3c7936216004) - **Published:** 2026-08-02 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/b1eef230-9ca3-4a2a-b6e2-d5fc77f4603c ## Historic action President Donald Trump utilized Section 338 of the 1930 Smoot-Hawley Act to impose new tariffs on Canada - a provision never before used by any president. The administration labeled Canada's 25% tariffs on US autos as 'discriminatory,' announcing 30% retaliatory tariffs. This decision marks a new phase in tensions that began with Trump's April 2025 'Liberation Day' executive order imposing global tariffs. ## Canada's response Canada had implemented 25% tariffs on US automobiles and parts in response to Trump's April 2025 global tariffs. The Canadian government maintains this was a lawful response to the US 'unilateral trade war.' However, the US administration claims Canada unfairly targets American products while exempting similar imports from other countries, calling it 'trade inequity.' ## What trade data reveals The administration claims Canada's US auto imports dropped by $5 billion (22%) while imports from Mexico, Japan, South Korea and Germany increased by $3 billion. Yet detailed data paints a different picture: While US auto exports to Canada saw sharp declines in late 2025, they rebounded in Q1 2026 before moderating. Historically, the US remains Canada's primary auto supplier. The selective data presentation raises questions about the tariffs' justification. ## Core issue in auto sector Experts suggest declining US auto sales in Canada stem more from shifting consumer behavior than tariffs. Toyota Canada's research shows 56% of Canadians are postponing major purchases, including cars, due to affordability concerns. Automotive News data indicates only a 1% overall decline in new car sales, with US brands like GM and Ford maintaining market leadership. This challenges the narrative of significant tariff impacts. ## Robust parts trade Canada's imports of US auto parts remained stable over the past year, peaking in March 2026. Historically, parts exports have matched auto exports in value, recently surpassing them. No data supports claims of tariff damage to parts trade, undermining the administration's retaliation argument. The resilience of this integrated supply chain suggests tariffs may ultimately harm both nations' automotive industries. ## Economic warnings Independent Institute researcher Caleb Petitt calls the tariff exchange 'a war with no winners.' While Canadian tariffs may harm Canada's economy, evidence shows minimal impact on US auto sector - the stated focus of Section 338 retaliation. Economists warn the real casualties will be consumers and both economies, noting trade wars historically damage all involved parties. ## Political calculus Analysts view Trump's move as part of a pre-2026 election strategy to bolster 'protecting American workers' rhetoric. However, auto industry representatives express concerns tariffs may ultimately hurt US manufacturers. The fact that Canada's tariffs responded to Trump's 2025 global measures complicates the 'discrimination' claims, revealing a cycle of retaliation rather than unilateral aggression. ## Implications and outcomes The new tariffs risk fueling a destructive cycle of trade retaliation. Historically, the Smoot-Hawley Act exacerbated the Great Depression. Experts warn tensions between NATO allies could disrupt global supply chains, particularly in the highly integrated auto industry. Consumers are likely to bear most costs, as tariffs on intermediate goods ultimately increase final product prices in both markets. ## Sources covering this story - https://fortune.com/2026/08/02/trump-canada-tariffs-legal-basis-1930-law-smoot-hawley/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._