A ruling against Trump could restrict presidential authority to impose tariffs and limit future administrations’ flexibility in trade negotiations, while a ruling in his favor would affirm broad executive control over U.S. trade policy, potentially redefining the scope of presidential power for decades to come.

Roberta Kaplan, the lawyer known for beating Donald Trump while representing writer E. Jean Carroll (and her work on the landmark LGBT rights case United States v. Windsor ), slammed the Supreme Court for handing the president a string of legal wins in recent months.