During oral arguments in November, even Trump-appointed justices seemed skeptical of the government's arguments that the president could impose tariffs without congressional approval. 

In the case of Learning Resources, Inc. v. Trump, two companies sued in May 2025 after Trump's "Liberation Day" announcement of tariffs.

At issue was whether the president exceeded his executive branch authority by imposing tariffs under the 1977 International Emergency Economic Powers Act, a law intended to address emergencies only.

The Trump administration has argued the trade imbalance constitutes a national emergency. Trump has consistently argued the United States has gotten a raw deal on trade with other countries that impose tariffs.

Normally, trade policy, including tariffs, is enacted through legislation in Congress and signed by the president.

Chief Justice John Roberts, who authored the majority opinion, wrote that the law Trump used "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," Roberts wrote.

"We claim no special competence in matters of economics or foreign affairs. We claim only, as we must, the limited role assigned to us by Article III of the Constitution. Fulfilling that role, we hold that IEEPA does not authorize the President to impose tariffs."

Justices Samuel Alito, Clarence Thomas, and Brett Kavanaugh all dissented from the majority opinion.

The case was uncharted waters for the Supreme Court, which had never before ruled on the extent of the International Emergency Economic Powers Act.

Tariffs have long been core to Trump's trade and economic agenda, often clashing with the more libertarian-leaning conservative views on free trade that dominated the Republican Party going back to at least the Ronald Reagan era. Subscribe for free to Breaking Christian News here

Fred Lucas is chief news correspondent and manager of the Investigative Reporting Project for The Daily Signal. He is the author of "The Myth of Voter Suppression: The Left's Assault on Clean Elections."

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