Trump’s Canada tariffs face untested legal challenge

President Donald Trump used a rarely invoked provision of the 1930 Tariff Act to impose a 50% tax on $20 billion in Canadian imports, prompting dollar-for-dollar retaliation from Ottawa and further straining relations between the two countries.

The authority, known as Section 338, has never been used or tested in court. Legal experts question whether later trade laws superseded it and whether the tariffs properly match documented harm, while other lawyers argue the measure fits the statute’s language. Trump’s previous tariff efforts have faced setbacks in court.

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