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.

President Donald Trump celebrated a Supreme Court ruling Friday that he said “hit hard” at birthright citizenship. But his executive order to prohibit the children of unauthorized immigrants and foreign visitors from obtaining automatic U.S. citizenship still faces a steep challenge in court.

The U.S. Supreme Court's landmark ruling blunting a potent weapon that federal judges have used to block government policies nationwide during legal challenges was in many ways a victory for President Donald Trump,