The U.S. Supreme Court on Friday issued a major decision scaling back the power of federal judges to block presidential policies nationwide, in what is considered a major win for the Trump administration’s efforts to end birthright citizenship for children born in the U.

Immigrant advocates are vowing to fight to ensure birthright citizenship remains the law as the Republican president tries to do away with more than a century of precedent.

Trump's order would require Social Security to change its automatic system for issuing Social Security numbers to newborns.