Tariffs

Trump's 50% Tariffs on Canadian Goods Illegally Rely on a Superseded Statute, a Lawsuit Argues

The import taxes fit a pattern of dubious legal rationales for the president's protectionist policies.

Jacob Sullum | 10.20.2026 5:10 PM

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Last July, President Donald Trump imposed 50 percent tariffs on various Canadian goods, a list he subsequently expanded to include additional imports, some of which he banned outright. His legal justification was Section 338 of the Smoot-Hawley Tariff Act, which Congress approved in 1930. Section 338 authorized tariffs in response to discriminatory trade practices. But in the 96 years since it was enacted, no president had ever used it to impose tariffs.

Why is that? According to a lawsuit that the Liberty Justice Center (LJC) filed on Tuesday in the U.S. Court of International Trade (CIT), the answer is clear: Section 338 was superseded by subsequent legislation that likewise targeted discriminatory trade barriers, beginning with the Reciprocal Trade Agreements Act of 1934 and culminating in Section 301 of the Trade Act of 1974. Section 301, the current remedy, includes requirements that Trump apparently sought to dodge by invoking Section 338 instead.

That maneuver is illegal, the LJC argues. "Congress already gave the executive branch a tool for responding to unfair foreign trade practices: Section 301, which requires an investigation, public comment and other safeguards," says Jeffrey M. Schwab, the LJC's director of litigation. "The administration cannot skip those protections by reaching for a 1930 statute that no president had ever used to impose a tariff."

Why not? "Where provisions in two acts are in irreconcilable conflict, the later act, to the extent of the conflict, constitutes an implied repeal of the earlier one," the lawsuit says. "Where a later act covers the whole subject of an earlier one and is clearly intended as a substitute, it operates similarly as a repeal. And a specific policy embodied in a later federal statute controls the construction of an earlier one even absent express amendment."

Even if Section 338 somehow survived congressional approval of contrary laws, the LJC........

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