WASHINGTON — The U.S. Supreme Court heard arguments Nov. 5 in a challenge to Trump tariffs imposed under a 1977 emergency-powers law, a case that could limit presidential power and force refunds. The justices are weighing whether the International Emergency Economic Powers Act can be used to levy tariffs, Dec. 30, 2025.
The case reached the justices after a federal appeals court said President Donald Trump overstepped the statute. The Supreme Court expedited review and left the tariffs in place while it decides, according to Reuters’ report on the Supreme Court hearing.
At issue are two parts of Trump’s second-term tariff program: a February round tied to pressure on China, Canada and Mexico over fentanyl trafficking, and broader April “reciprocal” rates applied to dozens of countries in response to trade deficits. The ruling will decide whether those Trump tariffs can stand — and what happens to money already collected at the border.
What’s at stake in the Trump tariffs case
A Congressional Research Service overview frames the question as statutory: IEEPA applies during a declared national emergency involving an “unusual and extraordinary threat,” and it lets the president “regulate” importation. But it does not mention “tariffs” or “duties,” the terms Congress typically uses when it delegates tariff power.
The administration says regulating importation can include Trump tariffs. Opponents say Congress wrote separate tariff statutes with explicit procedures and limits. In Trump v. V.O.S. Selections, the government also asks whether, if IEEPA authorizes the duties, the statute unconstitutionally delegates legislative authority.
Refunds could hinge on timing and procedure
If the court invalidates the Trump tariffs, the next fight is remedy. Importers pay duties at entry, but U.S. Customs and Border Protection later “liquidates” entries, a final accounting that can complicate refunds. In a SCOTUSblog analysis, the Court of International Trade declined to pause liquidation, citing the government’s position that refunds would still be available if the tariffs are struck down.
Brookings estimated that unwinding most IEEPA-based collections could push refunds from about $72 billion through the end of August to roughly $130 billion by the end of 2025, and more if a decision comes later. The importer-of-record rule could also complicate who recovers money when Trump tariffs were passed through in contracts or higher prices.
Past tariff fights offer a roadmap — and a warning
Trump’s first-term tariffs show how durable trade measures can become. In 2018, he imposed steel and aluminum duties under national-security authority, as Reuters reported at the time. In 2020, the Supreme Court declined to hear a constitutional challenge to those steel tariffs, according to Reuters’ account of the court’s decision.
The IEEPA case now before the justices goes further by testing whether an emergency statute can be treated as a sweeping tariff law. A ruling against the government could curb how easily presidents reach for emergency declarations to impose Trump tariffs-style levies. A ruling upholding the Trump tariffs could cement a powerful shortcut — and leave courts and companies to sort out the refund consequences.
