On 6 November 2025, the Supreme Court of the United States scrutinised Donald Trump’s use of emergency powers under the International Emergency Economic Powers Act (IEEPA) to impose sweeping tariffs on trading partners. Justices from both conservative and liberal benches expressed scepticism about whether the President holds authority to impose tariffs without Congress’s consent, raising concerns over the constitutional division of trade powers. Analysts say a ruling against the administration could ripple through global supply chains and U.S. trade policy.