Supreme Court strikes down Trump's IEEPA-based tariffs

The Supreme Court ruled in 2026 that President Trump's use of the International Emergency Economic Powers Act (IEEPA) to impose broad import tariffs was unconstitutional. The Court of International Trade had struck down the tariffs in May 2025, ruling IEEPA did not authorize tariff imposition; the Supreme Court's ruling resolved the central legal question and required the administration to seek congressional authorization to maintain the tariff regime or identify an alternative statutory basis.