WASHINGTON — The Supreme Court on Friday agreed to hear an unusual case in which Congress intervened to help victims of terrorism sue Palestinian entities.

At issue is whether the 2019 law, called the Promoting Security and Justice for Victims of Terrorism Act, unconstitutionally violates the due process rights of the Palestine Liberation Organization (PLO) and the Palestinian Authority (PA).

Congress, which rarely gets involved in specific cases, stepped in twice after the New York-based…