The Supreme Court is expected to weigh in on the legality and scope of presidential tariff authority under the International Emergency Economic Powers Act (IEEPA). The ruling could come as early as Friday and will affect more than $130 billion in duties collected in 2025, trillions more in future global commerce, and how the US executive branch can implement sweeping import taxes without congressional approval or input.

Scott Lincicome, along with members of Cato’s trade policy team, are available for comment on the implications of the IEEPA tariffs and broader questions surrounding presidential trade powers.

Scott Lincicome is the vice president of general economics and director of Cato’s Herbert A. Stiefel Center for Trade Policy Studies. He writes on international trade, subsidies and industrial policy, manufacturing, global supply chains, and how tariffs affect American households and economic growth.

Cato has also created a dedicated website compiling IEEPA background materials, scholar statements, past blogs, and press releases to help inform coverage as news develops.

If you’d like to speak with Lincicome or one of our trade or legal experts, please reach out to Emily at esalamon@​cato.​org.