• The Supreme Court ruled 6-3 that President Trump exceeded his authority by using the International Emergency Economic Powers Act to impose sweeping global tariffs
• Chief Justice Roberts wrote that IEEPA contains no reference to tariffs and no president had ever used the law to impose them in its nearly 50-year history
• More than $130 billion in tariff revenue may require refunding, but Section 232 tariffs on steel, aluminum, automobiles and other sectors remain untouched

WASHINGTON, DC (TDR) — The Supreme Court on Friday delivered a landmark rebuke to President Donald Trump's economic agenda, ruling 6-3 that his use of a 1977 emergency powers law to impose sweeping global tariffs was unlawful. The decision dismantles the most expansive element of the administration's trade policy while leaving significant questions about billions in potential refunds and the president's next moves.

Chief Justice John Roberts wrote the majority opinion, joined in full or in part by five other justices across ideological lines. The ruling struck down tariffs imposed under the International Emergency Economic Powers Act (IEEPA), which Trump had invoked to levy duties on imports from dozens of countries — including the "Liberation Day" reciprocal tariffs and separate levies tied to fentanyl trafficking.

"IEEPA contains no reference to tariffs or duties. The Government points to no statute in which Congress used the word 'regulate' to authorize taxation. And until now no President has read IEEPA to confer such power."

Freedom-Loving Beachwear by Red Beach Nation - Save 10% With Code RVM10

Trump, informed of the ruling during a White House breakfast with governors, called it a "disgrace" and told those gathered that he has a backup plan, according to a person familiar with his reaction.

How the Court Split — And Why It Matters

The 6-3 decision produced an unusual ideological alignment. Roberts was joined by conservative Justices Neil Gorsuch and Amy Coney Barrett, along with all three liberal justices — Sonia Sotomayor, Elena Kagan and Ketanji Brown Jackson. Dissenting were Justices Clarence Thomas, Samuel Alito and Brett Kavanaugh.

The majority itself split on reasoning. Roberts, Gorsuch and Barrett grounded their conclusion in the "major questions doctrine" — the principle that Congress must explicitly authorize policies of vast economic significance. The three liberal justices reached the same result through straightforward statutory interpretation, holding that IEEPA's text simply does not authorize tariffs.

"The President asserts the extraordinary power to unilaterally impose tariffs of unlimited amount, duration, and scope. In light of the breadth, history, and constitutional context of that asserted authority, he must identify clear congressional authorization to exercise it."

Gorsuch, a Trump appointee, added a notable concurrence emphasizing the constitutional separation of powers.

CLICK HERE TO READ MORE FROM THE THE DUPREE REPORT

"If history is any guide, the tables will turn and the day will come when those disappointed by today's result will appreciate the legislative process for the bulwark of liberty it is."

In dissent, Kavanaugh argued the majority got the statutory interpretation wrong, writing that tariffs are a traditional tool to regulate imports. But he also acknowledged the practical consequences ahead.

"The United States may be required to refund billions of dollars to importers who paid the IEEPA tariffs, even though some importers may have already passed on costs to consumers or others."

The Refund Question: Billions at Stake, No Clear Process

The ruling's most immediate and chaotic consequence may be the refund question the court explicitly declined to resolve. As of mid-December, the government had collected approximately $130 billion in IEEPA tariff revenue, according to Customs and Border Protection data. The Bipartisan Policy Center put the total new tariff revenue through January 2026 at $289 billion, though that figure includes non-IEEPA duties that remain in effect.

Economists at the Penn-Wharton Budget Model estimated that more than $175 billion in tariff collections are at risk of being refunded. The court left the mechanics entirely to lower courts and the U.S. Court of International Trade.

We Pay the Tariffs, a coalition of roughly 800 small businesses, immediately called for a fast and automatic refund process.

"Small businesses cannot afford to wait months or years while bureaucratic delays play out, nor can they afford expensive litigation just to recover money that was unlawfully collected from them in the first place."

The Committee for a Responsible Federal Budget raised a different concern, calling on lawmakers to address the lost tariff revenue. The nonpartisan think tank warned that with the national debt already matching the size of the entire economy and annual interest payments exceeding $1 trillion, the revenue gap represents a significant fiscal challenge.

What Tariffs Survive — And Trump's Remaining Options

The ruling does not wipe out all Trump tariffs. Section 232 tariffs imposed under the Trade Expansion Act of 1962 — which target specific products on national security grounds — remain entirely intact. These include 50% duties on semi-finished copper products, 25% levies on certain imported semiconductors, tariffs on steel, aluminum and automobiles, and duties on wood products including cabinetry.

Trade experts identified at least five alternative statutory pathways the administration could pursue. Section 232 itself allows tariffs on national security grounds with no cap on rates or duration, though it requires Commerce Department investigations into specific sectors rather than blanket country-wide levies. Section 301 of the Trade Act of 1974 permits country-specific tariffs after investigation into unfair trade practices. Section 122 of the same act allows tariffs up to 15% for 150 days before congressional approval is required — but has never been used.

Kavanaugh himself noted in dissent that the ruling may not significantly restrict presidential tariff authority going forward.

"In essence, the Court today concludes that the President checked the wrong statutory box by relying on IEEPA rather than another statute to impose these tariffs."

Reaction Splits Along Predictable — And Unpredictable — Lines

Congressional reaction revealed fractures within both parties. House Speaker Mike Johnson praised Trump's tariffs on X and said Congress and the administration would "determine the best path forward in the coming weeks."

Sen. Bernie Moreno of Ohio went further, calling the ruling "outrageous" and demanding Republicans pursue a reconciliation bill to codify the tariffs legislatively. But that approach faces steep obstacles — the Senate has twice voted in bipartisan fashion to undo specific Trump tariffs, with Republicans joining Democrats both times.

"The Supreme Court makes plain what should have been obvious: 'The power to impose tariffs is very clearly a branch of the power to tax.'"

That came from Republican Sen. Rand Paul of Kentucky, who broke sharply from party leadership to praise the decision. GOP Rep. Don Bacon of Nebraska also sided with the court, calling it a "common-sense and straightforward ruling."

Democrats largely celebrated. Rep. Brendan Boyle of Pennsylvania called the tariffs "a national sales tax on hardworking Americans." House Ways and Means Committee ranking member Richard Neal called it "a victory for the American people, the rule of law, and our standing in the global economy."

Markets React With Cautious Optimism

U.S. stocks rose following the ruling, with the Nasdaq Composite climbing approximately 1%, the S&P 500 adding about 0.7%, and the Dow Jones Industrial Average gaining 0.3%. Retail and apparel stocks saw sharper gains — Nike, Target, Dollar Tree and Abercrombie & Fitch all spiked between 4% and 6%.

"This SCOTUS decision comes at a critical moment for global supply chains as organizations have largely started to change their supply chain operations to navigate the global tariff landscape."

That assessment from Dan Ives of Wedbush Securities reflected the complicated reality for businesses that have already restructured operations around tariff assumptions that no longer hold.

Treasury yields rose across maturities, with the 10-year bond reaching 4.09%, while the U.S. dollar initially jumped before turning lower as investors digested the implications.

The Federal Reserve Bank of New York had published research just last week finding that U.S. firms and consumers bore roughly 90% of the economic burden of tariffs imposed in 2025. The Yale University Budget Lab placed the current average effective tariff rate at 16.9% — the highest since 1932.

What Comes Next

The administration has signaled it will not retreat on trade policy. Trade Representative Jamieson Greer had told The New York Times before the ruling that if the court ruled unfavorably, Trump planned to impose new tariffs "the next day" under alternative statutory authority. The Commerce Department already has open Section 232 investigations into pharmaceuticals, critical minerals, aircraft and other sectors.

International trading partners reacted with measured optimism. Canada's trade minister Dominic LeBlanc said the ruling "reinforces Canada's position" that IEEPA tariffs were unjustified, while noting that Section 232 duties on steel, aluminum and automotive sectors remain in effect. The European Union said it was "carefully analyzing" the decision.

The Canadian Chamber of Commerce offered perhaps the most clear-eyed assessment of what lies ahead.

"The Supreme Court's decision to strike down the use of IEEPA tariff powers is a legal ruling, not a reset of U.S. trade policy. This is certainly not the last chapter of this never-ending story."

If the Constitution assigns tariff power to Congress and the court has now enforced that boundary, will lawmakers use this moment to reassert congressional authority over trade — or will they quietly delegate it back to the executive through new legislation, and what does either path mean for the American consumers who ultimately pay the price?

Sources

This report was compiled using information from SCOTUSblog's analysis of the ruling, NPR's reporting on the decision and its context, CNBC's coverage of the ruling and market reaction, NBC News live updates on political reactions, NBC News reporting on the ruling's scope, CBS News on the decision and business reactions, TIME's breakdown of the ruling, The Hill's coverage of the decision, Bloomberg Law's analysis of Trump's remaining options, CNBC's sector-by-sector tariff impact analysis, CBC's reporting on Canadian reactions and Section 232 implications, and NPR's breakdown of seven key things to know post-ruling.

Freedom-Loving Beachwear by Red Beach Nation - Save 10% With Code RVM10