Justice Samuel Alito has asserted that a past Supreme Court ruling on birthright citizenship represents a "serious mistake" with potential national security implications. Speaking at a university event, Alito focused on the Court's interpretation of the 14th Amendment's Citizenship Clause, which grants citizenship to all persons "born or naturalized in the United States and subject to its jurisdiction."

Alito's remarks, made at the University of Notre Dame, specifically addressed concerns that the current understanding of birthright citizenship could extend to the children of individuals who are in the U.S. unlawfully or without proper authorization, a practice sometimes referred to as "birth tourism."

He suggested that this interpretation could create a national security vulnerability by automatically granting citizenship to the offspring of those entering the country without legal standing. Alito's comments signal a critical perspective on established legal precedent within the Supreme Court, raising questions about its application and potential future challenges.