This is probably the biggest case of the term. And some people have said this is the biggest case in decades because it's going to determine the president's authority. So this is about the International Emergency Economic Powers Act or IPA for short.And no president has used this to impose tariffs. It doesn't mention tariffs or duties in the language. But President Trump is saying that he can exert emergency powers.So what the statute does say is that in unusual and extraordinary circumstances, a president ...