US Supreme Court Blocks Trump’s Emergency Tariffs, Says Law Did Not Grant Authority

The Supreme Court of the United States has ruled that President Donald Trump did not have the legal power to impose sweeping tariffs under a 1977 emergency statute.

In a 6–3 decision delivered on Friday, the Court determined that the International Emergency Economic Powers Act (IEEPA) does not authorize a president to levy tariffs, even during a declared national emergency.

Chief Justice John Roberts, writing for the majority, stated that when Congress intends to grant tariff authority, it does so explicitly and with defined limits — something missing in the IEEPA. The Court emphasized that its role is to interpret the law, not to judge economic policy or foreign affairs decisions.

The ruling leaves unresolved what will happen to the roughly US$134 billion in tariffs collected from over 301,000 importers. The majority opinion did not address whether the government must refund the money, leaving that determination to lower courts.

Justice Brett Kavanaugh warned that any repayment process could be complicated and costly, describing it as a potential “mess” for the federal government.

The case challenged tariffs imposed during Trump’s presidency, including duties on imports from China, Mexico, and Canada, with some reaching 145 percent on certain Chinese goods. The administration argued that IEEPA allows the president to “regulate” importation, which they said included tariffs. Businesses opposed to the measures argued that the statute does not mention tariffs or duties.

Lower courts, including the United States Court of International Trade, had unanimously ruled that IEEPA did not authorize the tariffs.

While the ruling curtails the use of emergency powers for imposing tariffs, presidents still have other statutory mechanisms to enact trade measures, though these come with stricter time limits and procedural requirements than the broad authority Trump claimed under IEEPA.

Attention now turns to the legal and financial implications of the ruling, particularly whether and how previously collected tariff revenues will be addressed.

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