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Palestinian activist Mahmoud Khalil petitioned the US Supreme Court on October 19, 2026 to overturn a ruling allowing his re-arrest and deportation. Khalil's lawyers argue federal immigration law should not bar a district judge from ordering his release from ICE custody, after the Philadelphia-based 3rd Circuit Court of Appeals sided with the Trump administration; a lower court order blocking his re-detention remains in place pending the Supreme Court's decision.