President Donald Trump’s fondness for sweeping tariff powers met a wall of sceptical questions at the Supreme Court on Wednesday, hinting that the justices may be prepared to clip his wings. Relief for companies and countries hammered by those duties, however, will arrive on the slowest of slow boats.
Whether the Court rules that Trump overreached by invoking the 1977 International Emergency Economic Powers Act to slap tariffs on dozens of nations is almost beside the point. The president is besotted with tariffs, and trade lawyers note he has a small armoury of alternative statutes he can brandish if needed, even if none delivers the instant gratification he prefers.
Translation: Uncertainty will hang over major power negotiations with China, the European Union, and other partners, as well as the daily operations of thousands of firms that either pay the tariffs or adapt to avoid them. Betting markets marked down Trump’s odds on Wednesday night, and shares of major US retailers rallied on hopes of tariff relief, a touching display of optimism in a policy environment that rarely rewards it.
The administration put on a brave face after two and a half hours of arguments, even as key conservative justices peppered government lawyers with pointed doubts. On Fox News, Trump declared he had been told the case went well and warned that the world would be in depression without his import taxes. Subtlety has never been part of the sales pitch. Treasury Secretary Scott Bessent, who attended the hearing, told Fox Business he left “very, very optimistic”. A decision could arrive by year’s end, given the Court’s express timetable.
However, the list of questions raised by Trump’s tariffs continues to expand, including what a ruling against them might entail and whether previously paid duties might be refunded. Set aside the geopolitics, striking down IEEPA-based tariffs would undercut the core of the president’s international economic program, and arguably a significant portion of his foreign policy. If the IEEPA door closes, other doors remain ajar, from Section 301 to 232, 122, even the antique Section 338, each with different thresholds, durations, and caps. The common feature is uncertainty.
For China, any ruling would be a tactical, not strategic, moment. The White House can still raise duties using other authorities it leaned on in the first term. A temporary legal setback may appear to be a win in Beijing, but it is unlikely to be sustainable. Much of the recent friction between the US and China is not tariff-based; it is about control of sensitive goods, with the US exerting export controls on chips and advanced technology on one side, and China maintaining its grip on rare earths and critical inputs on the other. The fragile trade truce that Trump and Xi Jinping agreed upon last week is intended to lead to more leader-level meetings next year. Bessent calls relations “much calmer” now, which is true in the way a hurricane’s eye is calm.
If Washington pivots to other statutes to impose new tariffs, Beijing may well treat that as a breach of the truce, and we are back to the races. As Blake Harden of EY’s Washington Council put it, expect the administration to reach for Section 301 again where it can, keep swinging Section 232 sector duties, and keep other options warming on the hob.
Uncertainty is the order of the day. The fog is not costless. Companies will now model multiple supply chain and pricing scenarios, with the macro impact depending on how the Court rules. Bloomberg Economics estimates that a broad ruling against Trump would reduce the effective US tariff rate to approximately 6.5 percent, easing the drag on growth to a 0.6 percent hit to GDP, compared with a 1.7 percent impact if current tariffs remain in place. This estimate does not include any potential positive effects from duty refunds.
On the revenue story, the messaging is, to be charitable, fluid. Bessent has said it would be catastrophic to repay a large share of collected duties, while also calling the revenue exceptional but not crucial to the fiscal balance. Customs takings have helped trim the budget deficit to $ 1.78 trillion in the last fiscal year, down 2 percent from 2024, a rounding error against the debt stock, and likely to shrink as Trump’s flagship tax changes take effect.
Meanwhile, on the ground, predictability is what importers crave, but what they often lack. The IEEPA-based tariffs arrived with almost no notice, no investigations, and no published procedures, creating chronic import instability that will not disappear overnight. And with the government shutdown, Customs and Border Protection staff deemed essential have been working without pay for more than a month. If the Court orders refunds, processing them would be a colossal project.
In short, the Supreme Court may curb one tariff tool. Still, the administration has others, and businesses get to live in the gap between law and policy, where clarity often fails and contingency planning thrives.