March 3, 2026
The February 20 United States Supreme Court decision against President Donald Trump’s use of the U.S. International Emergency Economic Powers Act (IEEPA) to establish tariffs has led him to resort to other legal instruments. So-called U.S. reciprocal tariffs on countries set out in April 2025 were based on IEEPA, as were tariffs that allegedly punished countries for allowing fentanyl into the U.S. Trump tried to evade the constraints presented by other legal instruments that could f ...

