The Supreme Court’s review of Executive Order 14160, which seeks to deny birthright citizenship to children of undocumented immigrants and certain temporary visa holders under a narrow reading of the Fourteenth Amendment’s Citizenship Clause, has produced consistent signals that the order exceeds executive authority. Every lower federal court to examine the measure has blocked it, citing longstanding precedent from United States v. Wong Kim Ark and the clause’s text as codified in statute. Oral arguments in Trump v. Barbara reinforced this pattern, with multiple justices expressing skepticism toward the administration’s position. Traders assign a 95.2 percent probability that the Court will strike down the order because these factors align with established constitutional interpretation. A decision is expected by early July 2026; the only realistic variables that could alter the outcome involve an unanticipated change in the Court’s approach before final ruling.