In a major setback to the Trump administration Monday morning, the Supreme Court rejected a request to hear the federal government’s arguments against a ruling by the 9th Circuit Court of Appeals which had temporarily blocked the Trump administration from ending Obama’s Deferred Action for Childhood Arrivals (DACA) program for illegal aliens.

The program protects illegal aliens from deportation who were brought to the U.S. as children, and allows them to get work permits.

USA Today reports:

The program had faced a March 5 deadline for congressional action set by Trump last summer. Two federal courts have ruled the administration’s action was illegal.

The justices could have agreed to hear the case this spring, leapfrogging a federal appeals court based in California that has been sympathetic to the cause of immigrants. They also could have overruled federal District Judge William Alsup without a hearing.

Instead, they simply allowed the case to run its normal course through the appeals court, which it asked to “proceed expeditiously.” The case still could come to the high court in the future.

The action represents a temporary victory for the young adults brought to the U.S. illegally by their parents or guardians under the Deferred Action for Childhood Arrivals program established by President Barack Obama in 2012.