Trump’s Tariff Authority Faces Its Biggest Legal Test Yet — And the Supreme Court May Not Rule Until 2026
The Trump administration’s sweeping tariff regime, which has reshaped global trade flows and rattled financial markets for months, now faces a constitutional reckoning that could take more than a year to resolve. A legal challenge working its way through the federal courts argues that President Donald Trump exceeded his statutory authority under the International Emergency Economic Powers Act (IEEPA) when he imposed broad tariffs on virtually all U.S. trading partners. But the timeline for a definitive Supreme Court ruling stretches well into 2026, leaving businesses, investors, and foreign governments in a prolonged state of uncertainty. The case, brought by a coalition of importers and trade groups, strikes at the heart of the president’s claim that he can use emergency powers to impose tariffs without specific congressional authorization. The legal question is deceptively simple: Does IEEPA, a 1977 law designed to give presidents tools to respond to national emergencies ...