The ruling keeps President Donald Trump’s citizenship ban on hold for at least 30 days and sends cases back to the lower courts to determine next steps.

The ruling by Justice Amy Coney Barrett, who Trump appointed to the court in 2020, emphasized the need to hem in the power of judges, warning against an "imperial" judiciary. Judges can provide "complete relief" only to the plaintiffs before them, Barrett wrote.

The U.S. Supreme Court’s decision limiting federal judges from issuing nationwide injunctions threatens to upend numerous lawsuits that have led to orders blocking Trump administration policies.