Revelations on Saturday that an American law firm’s communications with a foreign government client were monitored by a National Security Agency ally may provide new impetus for the U.S. Supreme Court to revisit a 2013 decision that involved electronic surveillance law.

The justices, if they wish, have a vehicle for reconsidering their 5-4 decision in Clapper v. Amnesty International USA. The Center for Constitutional Rights last month filed a petition for review asking the high court to hear their challenge to surveillance by the NSA in light of Edward Snowden’s revelations about the extent of the surveillance program.