Supreme Court to hear Trump tariff cases under emergency powers

The U.S. Supreme Court will hear oral arguments on Nov. 5 in consolidated challenges to President Donald Trump’s use of emergency powers to impose broad tariffs on imports, a legal test that could reshape presidential authority over trade and affect billions in duties already collected. The lawsuits, brought by small businesses and a coalition of states, ask whether the International Emergency Economic Powers Act allows the president to impose sweeping, revenue‑raising tariffs without new congressional authorization.

The disputes trace to executive orders issued earlier this year that created two categories of levies: additional duties aimed at goods from Mexico, Canada and China described by the administration as responses to illicit fentanyl flows, and a baseline reciprocal tariff of 10 percent applied worldwide, with higher rates on dozens of countries justified by alleged trade deficits. Plaintiffs say the tariffs threaten their businesses and exceed statutory and constitutional limits; the government contends the measures fall squarely within IEEPA’s grant of authority to regulate importation in a declared national emergency.

Challengers argue that IEEPA neither mentions...