Frequently Asked Questions
Everything you need to know about US import duties, tariffs, and how to use the Gateway Tariff Simulator.
On February 20, 2026, the U.S. Supreme Court ruled 6-3 that tariffs imposed under the International Emergency Economic Powers Act (IEEPA) are unconstitutional. Chief Justice Roberts wrote the majority opinion, with Thomas, Alito, and Kavanaugh dissenting. This invalidates all reciprocal "Liberation Day" tariffs and fentanyl-related tariffs on China, Mexico, and Canada — roughly $133.5 billion in collected duties.
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