The Supreme Court’s Silence on Trump’s Tariffs
The Supreme Court did not address President Trump’s tariffs as many had anticipated on Friday. While there was an expectation for a ruling on the tariff case, the court instead delivered a decision on an unrelated criminal matter.
As it stands, the court has not indicated when it will reach a conclusion regarding the customs matter. This postponement means that tariffs remain in effect, leaving companies and trade partners sorting through a cloud of legal uncertainty.
Trump’s tariffs, which affect nearly every country globally, were enacted under the International Emergency Economic Powers Act of 1977, often abbreviated as Ieepa. This act has traditionally been utilized for more specific situations. Small business coalitions and state organizations have contested these import duties, claiming that the legislation does not authorize such tariffs and that the Constitution grants tax authority solely to Congress. These arguments have resonated with both the District Court and the Court of Appeals.
During a hearing in November, justices of the Supreme Court expressed skepticism regarding the administration’s justifications for the tariffs. Many seemed doubtful that Ieepa, which doesn’t clearly mention tariffs, could be interpreted to grant the president broad taxing authority over imports.
Chief Justice John Roberts, along with several other justices perceived as part of the conservative majority, seemed to hone in on the principle of principal inquiry. This doctrine prevents government agencies from interpreting vague legal texts as conferring significant powers not explicitly granted by Congress. Roberts remarked that treating the Emergency Regulation of Foreign Trade Act as an authority to impose unlimited tariffs on any product, from any country, raises concerns about a disconnect between the law’s wording and the powers being claimed.
Justice Barrett, appointed by Trump, posed questions about whether the need to shield the U.S. economy and national security could justify imposing tariffs on allies. She asked, “Are we suggesting we need tariffs on all countries due to threats to their defense and industrial bases? Spain? France? Sure, for some, but why so many others?”
On the other hand, a few justices indicated they might support the idea that Ieepa allows for tariffs, even if not specifically stated. Justice Brett Kavanaugh wondered if Congress intended to empower the president to handle emergencies appropriately, questioning why Congress would limit tariff authority while still granting other trade powers needed for emergency responses.
Several conservative justices, including Barrett and Gorsuch, reiterated concerns from lower courts regarding the executive branch’s interpretation of the IPA, fearing it could amount to an unconstitutional transfer of legislative power. Gorsuch voiced apprehension that such a grant could become entrenched, remarking that it would represent a concerning trend of consolidating power within the executive branch at the expense of elected representatives. It’s noteworthy that decades have passed since the Supreme Court overturned laws using this nondelegation doctrine.
The tariffs currently in question involve so-called reciprocal tariffs initiated in the spring on a wide range of imports, “bad actor” tariffs introduced in August, and penalties on China, Canada, and Mexico aimed at combating the traffic of fentanyl and its ingredients into the U.S. Other tariffs related to imported metals were not contested in court, as their legal foundations did not rely on Ieepa.

