#TrumpTariffs The tariffs, used by Trump as negotiating leverage with U.S. trading partners, and their on-again, off-again nature, have shocked markets and whipsawed companies of all sizes as they seek to manage supply chains, production, staffing and prices.

The ruling has no impact on other tariffs levied under more traditional legal authority, such as duties on steel and aluminum imports.

A three-judge panel of the U.S. Court of International Trade ruled on May 28 that the U.S. Constitution gave Congress, not the president, the power to levy taxes and tariffs, and that the president had exceeded his authority by invoking the International Emergency Economic Powers Act, a law intended to address "unusual and extraordinary" threats during national emergencies.