The US Supreme Court is preparing to rule in Trump v. Barbara (Docket 25-365) on whether Executive Order 14160 can end automatic birthright citizenship for children born in the United States to undocumented immigrants and temporary visa holders. A ruling is expected before the term ends in summer 2026. This regulatory analysis sets out the current rules under the 14th Amendment and 8 U.S.C. § 1401(a), what the executive order proposes to change, three realistic outcome scenarios, and what EB-5 and E-2 investors should expect ahead of the decision. NTL International reviews Caribbean Citizenship by Investment and European Residency by Investment alternatives that provide structural insulation from US policy volatility.