( May 19, 2026, 8:52 AM EDT) -- RICHMOND, Va. — The Fourth Circuit U.S. Court of Appeals held that there is not complete diversity of citizenship between parties in a lawsuit seeking a declaration that a professional and general liability insurer has a duty to defend its nonemergency medical transport company insured against an underlying negligence action, vacating a lower federal court’s dismissal of the lawsuit and remanding for the trial court to consider first whether the parties should be realigned....