A Chicago-area toy company is among the businesses arguing to the justices this week that most of the president’s tariffs should be struck down.

The U.S. Supreme Court holds oral arguments on Wednesday over the legality of President Donald Trump 's tariffs imposed under a law called the International Emergency Economic Powers Act, or IEEPA, t...

Trump argued that the outcome will determine whether presidents can use tariffs freely as a tool for both economic leverage and national security.