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U.S. Supreme Court Strikes Down Donald Trump Tariffs
The U.S. Supreme Court ruled that Donald Trump exceeded his authority by imposing sweeping tariffs under emergency powers, dealing a major legal and economic setback to his trade policy.
Image recreated by Popsmoke media. Of Trump standing outside US supreme court.
The U.S. Supreme Court on Friday struck down sweeping tariffs imposed by Donald Trump under emergency powers, handing the president a major legal defeat with significant implications for global trade and executive authority.
In a 6–3 decision authored by Chief Justice John Roberts, the court upheld a lower court ruling that Trump exceeded his authority by invoking the International Emergency Economic Powers Act (IEEPA) to impose broad tariffs. The justices ruled the statute’s authorization to “regulate” importation does not include the power to impose tariffs, emphasizing that the U.S. Constitution grants Congress not the president authority over taxes and tariffs.
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Trump reacted angrily at the White House, calling the decision “terrible” and “totally defective,” saying he was “ashamed of certain members of the court” and insisting he could pursue “other alternatives,” including a newly announced 10% global tariff under a different legal authority in addition to existing tariffs.
Roberts was joined in the majority by conservative justices Neil Gorsuch and Amy Coney Barrett, as well as liberal justices Sonia Sotomayor, Elena Kagan and Ketanji Brown Jackson. The ruling marked the most significant setback the court has dealt Trump since he returned to office in January 2025, despite earlier decisions allowing expansive presidential powers in other matters.
In dissent, Justice Brett Kavanaugh, joined by Clarence Thomas and Samuel Alito, wrote that the decision did not necessarily prevent Trump from imposing similar tariffs under other statutes and argued the ruling would not greatly restrict presidential tariff authority going forward. Trump praised the dissenting justices, saying he was “so proud” of Kavanaugh.
The dispute centered on Trump’s use of tariffs taxes on imports as a core economic and foreign policy tool in a global trade conflict launched during his second term. He argued tariffs were essential for U.S. economic security and warned the country would be “defenseless and ruined” without them. Roberts wrote that a president must point to “clear congressional authorization” for such sweeping action and that Trump could not.
Markets reacted with volatility as investors weighed potential inflation relief against uncertainty over future tariff policies. Business groups welcomed the ruling but warned it could lead to months of uncertainty while the administration seeks alternative legal paths. The decision did not address whether the government must refund tariff revenue already collected, a process Kavanaugh predicted could be a “mess.”
Government data shows tariffs imposed under other authorities account for about one-third of revenue from Trump’s trade measures. Economists from the Penn-Wharton Budget Model estimated that more than $175 billion had been collected from IEEPA-based tariffs alone. The Congressional Budget Office previously estimated that if all current tariffs remained, they could generate about $300 billion annually over the next decade.
Trump had declared a national emergency tied to the U.S. trade deficit, which rose to a record $1.24 trillion in 2025, to justify tariffs on nearly all trading partners. Roberts wrote it was “telling” that no prior president had used the statute to impose tariffs, especially of such magnitude, warning that accepting the administration’s argument would replace longstanding executive-legislative collaboration with unchecked presidential policymaking. Part of the majority also cited the “major questions” doctrine, which requires clear congressional authorization for executive actions of vast economic or political significance a principle previously used to block initiatives by former President Joe Biden. Liberal justices did not join that portion of the opinion.
The case was brought by businesses and 12 states Arizona, Colorado, Connecticut, Delaware, Illinois, Maine, Minnesota, Nevada, New Mexico, New York, Oregon and Vermont after the U.S. Court of Appeals for the Federal Circuit sided with challengers. Historically, IEEPA has been used to impose sanctions or freeze assets of foreign adversaries, not tariffs, and does not explicitly mention them. Trump’s Justice Department had argued that its language permitting regulation of imports allowed tariffs during emergencies.
International reaction suggested the ruling would not necessarily ease trade tensions. Candace Laing of the Canadian Chamber of Commerce said Canada should prepare for “new, blunter mechanisms” from Washington. Treasury Secretary Scott Bessent and other officials have said the administration could rely on other statutes, including provisions allowing tariffs on imports that threaten national security or retaliatory measures determined by the Office of the U.S. Trade Representative. None, however, offer the same speed or scope as IEEPA.
California Governor Gavin Newsom urged the administration to issue refunds, calling the tariffs an “illegal cash grab,” while Senate Democratic Leader Chuck Schumer described the ruling as a “victory for the wallets of every American consumer.”
Trump’s tariffs had targeted numerous countries, including China, Canada and Mexico, citing issues such as fentanyl trafficking, and were also used as leverage in disputes involving Brazil, India and Russia. One dispute referenced an anti-tariff advertisement by Ontario.
Trump’s emergency tariff initiative had been forecast to generate trillions of dollars over a decade. But the court’s ruling limits that strategy, reinforcing constitutional boundaries on executive power and leaving unresolved how existing tariff collections will be handled or when halted assessments at ports of entry might take effect.
Editor’s Note:
This report covers the ruling by the U.S. Supreme Court invalidating tariffs imposed under emergency powers by Donald Trump. The article summarizes the court’s decision, reactions from officials and stakeholders, legal Reasoning cited by Chief Justice John Roberts, dissenting opinions, economic implications, and potential next steps for U.S. trade policy.
