The Supreme Court’s June 30, 2026, 6-3 decision in Trump v. Barbara upheld birthright citizenship under the 14th Amendment and struck down the executive order, with Chief Justice Roberts authoring the majority opinion joined by Justices Barrett, Kavanaugh, and the three liberals. Rehearings remain exceptionally rare and require a majority of justices to identify a clear error or intervening development, a threshold the Court has met only a handful of times in recent decades. Trump publicly signaled intent to petition shortly after the ruling, but no subsequent filings or docket activity have altered the procedural posture. Traders price the “No” outcome at 95 percent because the existing opinion rests on longstanding precedent, including United States v. Wong Kim Ark, and the Court’s term has concluded without signals of reconsideration. Late developments that could still shift odds include an unusually strong petition highlighting a novel statutory argument or an unforeseen vacancy altering the Court’s composition before year-end.