Justices agreed to review the case led by immigrant rights group Al Otro Lado, who urged the court to leave in place a 9th Circuit U.S. Court of Appeal decision that said Trump's border approach was unconstitutional.

Trump administration’s claim it has authority to ‘meter’ applications may turn on definition of arriving in US

The Justice Department said border officials must be able to turn away asylum seekers during surges. Lower courts said that's against the law.