The power of a single judge to issue a nationwide injunction has become pivotal in the question of whether Trump can quickly implement his aggressive agenda. Several cases either already awaiting action by the Supreme Court or heading toward nine justices involve such a judicial order.

Republican-appointed justices handed the second Trump administration its first win at the U.S. Supreme Court on Friday, allowing the Department of Education to temporarily freeze millions of dollars in grants intended to help states combat K-12 teacher shortages while a legal battle over the money plays out.

The high court, over three justices' dissent, granted the administration's request to remove a lower court's block on ending the grants.