The Supreme Court of the United States struck down President Donald Trump’s sweeping global tariffs in a 6-3 decision on February 20, 2026. The ruling invalidated tariffs imposed under the International Emergency Economic Powers Act (IEEPA), a 1977 law that allows the president to regulate commerce during declared national emergencies tied to foreign threats.
The Majority Opinion
Chief Justice John Roberts wrote the majority opinion. He was joined by Justices Sonia Sotomayor, Elena Kagan, Neil Gorsuch, Amy Coney Barrett, and Ketanji Brown Jackson. The majority held that IEEPA does not authorize the president to impose tariffs. The statute grants power to “regulate… importation” but contains no reference to tariffs or duties. No prior president had interpreted IEEPA to allow taxation on imports.
The court applied the major questions doctrine, rejecting the claim of extraordinary unilateral authority to set tariffs of unlimited amount, duration, and scope without clear congressional authorization. The Constitution assigns the power to tax imports to Congress.
Case Background and Specific Tariffs
The cases consolidated for the ruling were Learning Resources, Inc. v. Trump and V.O.S. Selections v. United States. Challenges came from importers and businesses affected by the tariffs. The tariffs included:
- 25% on most imports from Canada and Mexico.
- 10% on most from China linked to drug trafficking concerns.
- At least 10% on imports from many other nations to address trade deficits impacting U.S. manufacturing and supply chains.
Trump declared national emergencies for illegal drugs from Canada, Mexico, and China, and for persistent trade imbalances. These declarations enabled the use of IEEPA. The tariffs underwent frequent modifications and higher rates on specific countries.
The lower court, the U.S. Court of Appeals for the Federal Circuit, ruled against the tariffs in August 2025. The Supreme Court affirmed that decision on the merits. In one case, the court vacated and remanded for dismissal on jurisdictional grounds. The core holding remained: IEEPA is not a tariff statute.
The Dissent and Economic Impact
Justice Brett Kavanaugh wrote a dissent, joined by Justices Clarence Thomas and Samuel Alito. Kavanaugh argued the ruling could require the federal government to refund billions in collected tariffs. Estimates placed the total collected under these IEEPA tariffs at over $160 billion to $175 billion by early 2026.
Some importers passed costs to consumers. Kavanaugh warned the decision might create uncertainty in trade agreements negotiated using tariff leverage, including deals with China, the United Kingdom, and Japan worth trillions.
The Question of Refunds
The ruling left open the question of refunds. The court did not decide whether or how importers receive repayment. It remanded aspects to the United States Court of International Trade for further proceedings on that issue. Companies began preparing claims for refunds immediately after the decision.
Presidential Response and New Measures
President Trump responded within hours. He denounced the justices who ruled against him as a disgrace and unpatriotic. He announced and signed a new 10% global tariff on imports from all countries. This new tariff used authority under Section 122 of the Trade Act of 1974, a different law allowing temporary tariffs in response to trade deficits.
The new measure took effect soon after, with exemptions for items like minerals and energy products. It could last up to 150 days. Trump described the Supreme Court decision as deeply disappointing but stated he had other options to protect American interests.
Policy Implications and Legal Limits
The original IEEPA tariffs formed a central part of Trump’s trade policy in his second term. They aimed to reduce trade deficits, combat drug flows, and strengthen domestic manufacturing. The ruling removed a key tool for unilateral executive action on trade. Other tariffs imposed under different statutes, such as Section 301 of the Trade Act of 1974, remained unaffected.
The decision reinforced limits on executive power over taxation and commerce. It prevented the president from using emergency declarations to bypass Congress on broad import taxes. Markets reacted with initial uncertainty, though stocks rose in some sessions as the new tariff provided continuity in trade pressure. Global trading partners faced renewed duties despite the invalidation of the prior levies.
Future Proceedings
Importers now pursue billions in potential refunds through the Court of International Trade. The process will determine the scale of repayments and any offsets. The ruling exposed risks in relying on broad interpretations of emergency powers for economic policy. It confirmed that major economic decisions like widespread tariffs require explicit congressional approval under the Constitution.
This Supreme Court decision curbed an overreach of executive authority and restored the constitutional balance on trade taxation.
