The US Supreme Court will hear arguments on November 5 to decide the legality of former President Trump’s broad global tariffs. 

The US Supreme Court has scheduled 5 November 2025 to hear arguments on the legality of former President Donald Trump’s global tariffs, a significant test of his use of executive power central to his trade and economic policies.

Earlier, the US Appeals Court ruling on 29 August stated that Trump had exceeded his authority under the International Emergency Economic Powers Act (IEEPA), a 1977 law intended for emergencies, but allowed them to remain in place until 14 October to give the administration time to appeal to the Supreme Court. Historically, IEEPA has been used for sanctions and asset freezes, not tariffs, making Trump’s use of the law unprecedented.

The challenge was brought by small businesses, 12 predominantly Democrat-led states, such as Arizona, Colorado, Connecticut, Delaware, Illinois, Maine, Minnesota, Nevada, New Mexico, New York, Oregon and Vermont, and a family-owned toy company, Learning Resources.

Tariffs have been a cornerstone of the Trump administration’s foreign policy, used to pressure trading partners and renegotiate trade deals, though they have also caused financial market volatility.