US Supreme Court Strikes Down Trump’s Sweeping Global Tariffs in Landmark 6-3 Ruling

In a major blow to President Donald Trump’s economic strategy, the U.S. Supreme Court ruled today that the president overstepped his authority when he imposed broad tariffs on imports from nearly every trading partner, striking down large parts of his tariff program.

The 6-3 decision was written by Chief Justice John Roberts. The majority held that the International Emergency Economic Powers Act of 1977 does not give the president the power to impose tariffs. That law was created to regulate certain international transactions during declared national emergencies tied to foreign threats, but the Court found it was improperly used to place duties on a vast array of goods from around the world.

The ruling stresses that the Constitution gives Congress, not the executive branch, the primary power to levy taxes and duties on imports. This decision invalidates many of the so-called reciprocal and emergency-based tariffs Trump put in place starting in 2025. Those measures targeted imports from countries including Canada, Mexico, China and others, often justified by concerns over trade imbalances, drug trafficking and national security.

Justices Clarence Thomas, Samuel Alito and Brett Kavanaugh dissented.

The case came before the Court after challenges from businesses, several states and importers. Lower courts, including the U.S. Court of International Trade, had previously ruled against the tariffs in cases such as Learning Resources, Inc. v. Trump.

Since the tariffs took effect, the federal government has collected more than $200 billion in duties. Experts estimate that potential refunds to importers could reach billions of dollars, though the refund process, managed through U.S. Customs and Border Protection and possibly involving further litigation in the Court of International Trade, will likely be complicated and lengthy. According to the Committee for a Responsible Federal Budget and other analysts, the loss of this tariff revenue without replacement policies could add roughly $2 trillion to federal deficits over the next decade.

The Trump administration has already indicated it will look for other legal authorities under existing trade laws to reimpose similar measures as quickly as possible.

Speaking at a White House breakfast with governors this morning, President Trump described the ruling as a disgrace and expressed clear frustration with the Court, according to people familiar with his remarks. The White House says it remains committed to advancing its trade objectives through whatever avenues remain open.

This decision stands as a significant limit on executive authority in trade policy and a reaffirmation of Congress’s central role in matters of taxation and import duties. The full opinion is now available on the Supreme Court’s website under docket number 24-1287. Financial markets and international trading partners are already evaluating the immediate consequences, with possible changes to supply chains and consumer prices expected in the coming weeks and months.