In a significant legal blow to the White House’s economic agenda, the U.S. Supreme Court on Friday struck down President Donald Trump’s sweeping global tariffs. The 6-3 ruling determined that the administration exceeded its constitutional authority by using a 1977 national emergency law to unilaterally impose taxes on nearly all imported goods. The decision effectively dismantles a central pillar of Trump’s second-term trade policy, which has been defined by aggressive protectionism and a widening global trade war.
Writing for the majority, Chief Justice John Roberts emphasized that the U.S. Constitution grants the power to issue taxes and tariffs exclusively to Congress, not the executive branch. The court rejected the administration’s argument that the International Emergency Economic Powers Act (IEEPA) allowed the president to bypass legislative approval by declaring an “economic emergency.” Roberts noted that while the president has broad powers during crises, those powers do not extend to permanent, across-the-board taxation without clear congressional authorization.
The ruling specifically targets the “reciprocal” tariffs of 10% or higher that were levied on nearly every U.S. trading partner starting in April 2025. These measures were originally justified by the administration as a necessary response to persistent trade deficits and issues such as fentanyl trafficking. However, the court found that these justifications did not meet the legal threshold required to override the legislative branch’s authority over commerce.
The legal defeat carries massive financial implications, with economists estimating that the federal government may now be required to refund more than $175 billion collected under the IEEPA-based tariffs. Groups such as the Penn-Wharton Budget Model suggest these refunds are likely necessary following the court’s invalidation of the levies. Despite the ruling, some tariffs imposed under other specific trade laws—such as those on steel, aluminum, and automobiles—remain in place as they were not part of this specific legal challenge.
Reaction to the decision has been swift and divided across the political spectrum. President Trump, who recently defended the policy at a campaign event in Georgia by calling “tariff” his favorite word, labeled the ruling an “economic body blow” to the country. Conversely, a broad coalition of libertarian groups, pro-business organizations, and Democratic lawmakers praised the decision, arguing that the tariffs had fueled inflation and increased the cost of living for American households.
The ruling also provides immediate relief to major trading partners, including Canada, Mexico, and China, who had faced billions in additional costs. In California alone, state officials had warned that the tariffs threatened to cost the local economy $25 billion and tens of thousands of jobs. International markets and trade advocates have largely welcomed the court’s intervention, viewing it as a necessary step toward stabilizing global supply chains and reducing economic uncertainty.
While the Supreme Court has blocked the use of emergency powers for broad tariffs, the White House has already signaled its intent to find alternative legal routes to maintain its trade barriers. However, legal experts suggest that any new attempts will be significantly more time-constrained and subject to stricter congressional oversight. For now, the ruling stands as a rare and high-profile rebuke of President Trump’s executive authority by a conservative-leaning court he helped shape.
