WASHINGTON — A united conservative majority of the Supreme Court ruled Friday that federal judges lack the authority to grant nationwide injunctions, but the decision left unclear whether President Donald Trump's restrictions on birthright citizenship could soon take effect in parts of the country.
The outcome represented a victory for Trump, who has complained about judges throwing up obstacles to his agenda. Nationwide, or universal, injunctions had emerged as an important check on the Republican president's efforts to expand executive power and remake the government and a source of mounting frustration to him and his allies.
But the court left open the possibility that the birthright citizenship changes could remain blocked nationwide. Trump's order would deny citizenship to U.S.-born children of people who are in the country illegally or temporarily.
The cases now return to lower courts, where judges will have to decide how to tailor their orders to comply with the high court ruling, which was written by Justice Amy Coney Barrett. Enforcement of the policy can't take place for another 30 days, Barrett wrote.
Even then it's unclear whether the court's decision could produce a confusing patchwork of rules that might differ in the 22 states that sued over the Trump order and the rest of the country.
The justices agreed with the Trump administration, as well as President Joe Biden's Democratic administration before it, that judges are overreaching by issuing orders that apply to everyone instead of just the parties before the court. Judges have issued more than 40 such orders since Trump took office for a second term in January.
The administration has filed emergency appeals with the justices of many of those orders, including the ones on birthright citizenship. The court rarely hears arguments and issues major decisions on its emergency, or shadow, docket, but it did so in this case.
Federal courts, Barrett wrote, ''do not exercise general oversight of the Executive Branch; they resolve cases and controversies consistent with the authority Congress has given them. When a court concludes that the Executive Branch has acted unlawfully, the answer is not for the court to exceed its power, too.''