U.S. Trade Representative Jamieson Greer said "stand by" the trade deal agreements it has signed with its partners despite the Supreme Court's tariff decision.

The move comes after the Supreme Court handed the White House a huge setback to one of its signature economic and foreign policy tools.

A trade group representing Detroit’s Big Three automakers expressed concern in a letter Friday to President Trump’s top trade officials about the potential of new tariffs being imposed, according to a person familiar with the matter.