A federal judge has blocked Donald Trump's second attempt to restrict birthright citizenship, raising concerns that babies already defined as citizens by the Supreme Court could have their citizenship revoked under an order the president signed in August.

The ruling came after Trump signed an executive order aiming to end automatic citizenship for children born in the U.S. to undocumented parents. Legal experts warned the order could upend decades of precedent established by the 14th Amendment.

The case is expected to move toward the Supreme Court, where John Roberts and other justices may weigh in on the constitutionality of the policy. Advocates argue the order threatens fundamental rights, while supporters claim it restores legislative intent.

The decision adds to ongoing legal battles over immigration policy and presidential authority, with courts across the country monitoring similar challenges to Trump's agenda.