Contributor: The Supreme Court's tariffs decision sends a clear message to Trump - Los Angeles Times

Los Angeles Times

by Erwin Chemerinsky

February 20, 2026

AI-Generated Deep Dive Summary

The Supreme Court's recent ruling invalidating President Trump's tariffs marks a significant decision emphasizing Congress's exclusive authority to impose taxes. In a 6-3 vote, the justices determined that the International Emergency Economic Powers Act (IEEPA) does not grant presidential authority to levy tariffs. This decision underscores the principle of separation of powers and reinforces the judiciary's role in holding the executive branch accountable. Trump had long treated tariffs as an instrument he could impose or revoke at will. The case challenging his tariffs was brought by several importers, arguing that the president exceeded his authority under IEEPA. While IEEPA allows the regulation of imports during national emergencies, it explicitly excludes taxation powers like tariffs. The Court's majority opinion, led by Chief Justice John Roberts, stated that Congress must explicitly delegate taxing authority to the executive branch. The ruling highlights a broader debate over the major questions doctrine, which requires clear congressional authorization for significant policy decisions. In this case, the justices found that imposing tariffs on such a large scale constitutes a major economic action requiring explicit legislative

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Originally published on Los Angeles Times on 2/20/2026