The Trump administration had argued that DACA was unconstitutional and would not hold up in the courts, since numerous conservative states had threatened to sue over the program. But multiple lower courts have since ruled that the Trump administration’s legal reasoning did not justify ending DACA.

For instance, had Trump simply ended the program as a matter of policy preference, his decision would most likely have withstood lawsuits. But since the administration opted for a specific legal argument, the lower courts ruled that its reasoning was too weak.

But lawyers for the Department of Justice argued that since DACA was created though a president’s executive action, it could also be dismantled by a different president’s executive action.