The program is keeping about 700,000 young people from being deported, NPR's Joel Rose notes. At the moment, DACA is accepting renewals but not new applicants. If the program is ended, currently protected individuals could be deported, though it's not clear how quickly that might happen.

More than a year ago, the Trump administration announced it was ending the program. Multiple judges have blocked that change, and three cases have worked their way to the federal appellate level.

But the Trump administration is asking the Supreme Court to skip ahead in the process — and step in before the lower courts are finished.