A federal appeals court found President Donald Trump’s global tariffs unlawful but held off on immediate action. The delay sets up a Supreme Court fight that could upend U.S. trade strategy and open the door to costly tariff refunds.
Majority Rebukes Scale of Tariffs
The Federal Circuit’s decision reinforced an earlier Court of International Trade finding that the International Emergency Economic Powers Act (IEEPA) does not give the president authority to impose tariffs of unlimited duration or scope. The majority noted that IEEPA contains no explicit reference to tariffs and warned against reading into the law powers that would effectively allow the White House to reconfigure the global trade system without congressional approval.
The ruling applies to the administration’s “Trafficking Tariffs” on Mexico, China, and Canada, as well as the “Reciprocal Tariffs” imposed on nearly all trading partners earlier this year. While the judges emphasized they were not weighing the policy merits of tariffs, they concluded the orders were not authorized under IEEPA.
Trump has defended the measures as vital to U.S. security and economic power. In a Truth Social post, he said the court’s majority represented a “Radical Left group of judges” ignoring the trillions in tariff revenue collected since January.
Uncertain Supreme Court Path Ahead
The administration now has until October 14 to appeal to the Supreme Court. Legal experts caution that the high court’s conservative majority could take a different view, particularly given a dissenting opinion that emphasized Congress’s long-standing deference to presidential authority in foreign affairs. The dissent argued that unless lawmakers actively overturn the president’s national security findings, broad tariff powers remain constitutional.
Still, the majority’s skepticism rests on the extraordinary scale of the levies. “It’s really the scale of what the president is doing here that is causing the majority concern,” noted Michael Lowell, a trade attorney at Reed Smith. “He is effectively remaking the entire international trade system.”
For companies, the stakes are immediate. Trillions of dollars in imports have been hit by duties since January, and a loss at the Supreme Court could trigger refund obligations. Law firms are advising importers to ensure tariff records are complete, as companies that rely solely on brokers may find themselves unprepared to file claims.
Preparing for a Refund Battle
Even if the Supreme Court agrees to hear the case, uncertainty will persist well into 2026. Trade attorneys note that a ruling against the administration could unleash a wave of refund requests, snarling customs systems and raising the prospect of significant government payouts. Recent trade reports suggest that many firms lack direct access to detailed import documentation, making early preparation essential.
What may be overlooked in the legal wrangling is how quickly global supply strategies have shifted around the tariffs. Manufacturers have rerouted sourcing and restructured logistics networks in response, absorbing higher costs and altering competitive dynamics. Even if the levies are overturned, those changes will not unwind easily, leaving a long tail of disruption that outlasts the legal fight.
