Former US President Donald Trump has filed an urgent Supreme Court tariff appeal after a lower court ruled that many of his sweeping import duties were illegal.
The petition, lodged Wednesday night, asks the justices to overturn a decision by the US Court of Appeals for the Federal Circuit, which found that Trump’s tariffs imposed under the International Emergency Economic Powers Act (IEEPA) went beyond presidential authority. The 7–4 ruling stated that setting tariffs is a core power of Congress, not the president.
If upheld, the ruling could force Washington to refund billions collected from importers and dismantle a key pillar of Trump’s trade agenda.
Stakes of the Trump Supreme Court Tariff Appeal
Trump declared an “economic emergency” in April, arguing that trade imbalances threatened national security and domestic manufacturing. Using IEEPA, he imposed a baseline 10% tariff and “reciprocal” duties on more than 90 countries, including Canada, Mexico, and China.
Solicitor General John Sauer warned in the Supreme Court filing that the lower court’s “erroneous decision” had disrupted sensitive trade talks and undermined US leverage. Lawyers for small businesses challenging the duties argue the tariffs were unlawful and inflicted “serious harm” on exporters, manufacturers, and consumers.
Next Steps in Tariff Battle
The appellate court has delayed enforcing its ruling until October 14, giving the Trump Supreme Court tariff appeal time to proceed. If the justices decline to take the case, the tariffs could be struck down within weeks.
Some duties, such as those on steel and aluminium imposed under separate legal authority, remain unaffected. Still, the outcome could reshape America’s trade relationships and test the limits of presidential power over economic policy.
With billions in trade revenue and US global credibility on the line, the Supreme Court now holds the fate of Trump’s signature tariff strategy.
