The U.S. Supreme Court has agreed to hear arguments in President Donald Trump’s tariff case this fall, marking a pivotal moment in the legal dispute over executive power. The case centers on whether Trump exceeded his authority by using emergency powers to impose tariffs on imported goods. Oral arguments are scheduled for the first week of November, with the court pledging to expedite its review.

The legal challenge arises from a federal appeals court ruling in late August, which determined that Trump overstepped his constitutional limits by invoking the International Emergency Economic Powers Act (IEEPA) to justify tariffs. The appeals court emphasized that the power to impose taxes and tariffs is a “core congressional authority” reserved for the legislative branch. Despite this, the tariffs remain in effect as the Supreme Court deliberates.

Trump has long relied on tariffs as a key tool in his foreign policy, leveraging them to renegotiate trade agreements, pressure adversaries, and address trade imbalances. In 2019, he invoked the IEEPA to impose duties on goods from specific countries, including China, Canada, and Mexico, citing concerns over fentanyl trafficking and economic leverage. The law grants the president authority to act during national emergencies, though it had historically been used for sanctions or asset freezes rather than tariffs.

The Department of Justice has argued that rejecting Trump’s tariff powers would leave the U.S. vulnerable to trade retaliation and economic instability, warning of potential “economic catastrophe.” Meanwhile, the nonpartisan Congressional Budget Office estimated that increased import duties could reduce the national deficit by $4 trillion over a decade. The Supreme Court’s decision is expected to shape the balance of power between the executive and legislative branches in matters of trade policy.