The Peterson Institute for International Economics (PIIE) is an independent nonprofit, nonpartisan research organization dedicated to strengthening prosperity and human welfare in the global economy through expert analysis and practical policy solutions.
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View allFollowing the Supreme Court ruling on February 20, 2026, that the International Emergency Economic Powers Act (IEEPA) does not authorize the president to impose tariffs, PIIE nonresident senior fellow Douglas A. Irwin explains why the ruling matters and what might come next for Trump's tariffs.
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Music by Revel Day, Jobii/Stockholm/Courtesy of Epidemic Sound