President Donald Trump plans to impose 50 percent tariffs on Canadian imports, citing Section 338 of the Smoot-Hawley Tariff Act of 1930. The legal basis for the proposed action rests on outdated legislation that experts say Trump's administration is misapplying.

Smoot-Hawley stands as one of the most infamous pieces of American trade policy. Economists widely blame the 1930 law for deepening the Great Depression by triggering retaliatory tariffs from trading partners and strangling global commerce. Congress repealed key provisions decades ago, and Section 338 itself has been inoperative for generations.

Trump's reliance on this defunct statute signals his administration intends to bypass modern trade frameworks and existing congressional authority. The proposed 50 percent tariffs would hit major Canadian sectors including automobiles, energy, and agricultural products. Canada ranks as the largest single trading partner for the United States, making the tariffs a direct threat to continental supply chains and consumer prices.

Legal scholars question whether Trump possesses authority to invoke Section 338 without congressional approval. The proposed action circumvents the US-Mexico-Canada Agreement, the trade deal Trump himself negotiated in 2018. Congress has not authorized new tariffs under the defunct Smoot-Hawley framework in nearly a century.

The tariffs appear tied to Trump's stated goal of pressuring Canada on immigration and the northern border. The trade measure blurs economic policy with immigration enforcement, a pattern his administration has pursued across multiple agencies.

Canadian officials have signaled they will retaliate with their own tariffs on American goods. Such escalation would disrupt industries on both sides of the border and raise prices for consumers in both nations.