The case involves 10% tariffs the president imposed on almost every country in April and bigger ones he imposed and then suspended on countries with which the United States runs trade deficits. It also involves tariffs Trump plastered on imports from China, Canada and Mexico to pressure them to do more to stop the illegal flow of immigrants and synthetic opioids across the U.S. border.
In declaring the tariffs, Trump had invoked emergency powers under a 1977 law. But a three-judge panel of the U.S. Court of International Trade ruled he had exceeded his power.
The tariffs upended global trade, paralyzed businesses and spooked financial markets.