On February 20, 2026, the Supreme Court delivered a major blow to the administration’s trade policy, ruling that the President cannot use emergency powers (specifically IEEPA) to bypass Congress’s constitutional authority to levy taxes and tariffs.

Writing for the majority, Chief Justice John Roberts clarified the fundamental nature of trade duties. He rejected the administration's argument that "regulating importation" under emergency law includes the power to set tariff rates.

"The Constitution very clearly assigns the authority to levy taxes—including tariffs—to Congress. The Framers did not vest any part of the taxing power in the Executive Branch. A tariff is a tax, and in our system, the power of the purse belongs to the people’s representatives."

— Chief Justice John Roberts

This quote reinforces the idea that tariffs are not merely tools of foreign policy or "regulations" of trade, but are domestic taxes paid by American importers and consumers.

The SCOTUS ruling specifically targeted the use of IEEPA. The President still has other, more targeted tools, though they require longer processes:

This ruling is a modern validation of Justice Antonin Scalia’s philosophy on why the United States is "exceptional." Scalia famously argued that the Bill of Rights is not what makes America unique—many "banana republics" have bills of rights that look better on paper.

Scalia maintained that American Exceptionalism lies in the Structure of Government. He argued that the Separation of Powers and the system of Checks and Balances are the "chains" that bind the "mischief" of government.

In this case, the Supreme Court fulfilled its "exceptional" role: ensuring that even the most powerful executive cannot seize the "Power of the Purse" without a clear mandate from the people's representatives in Congress.