A federal judge has voided former Army Sgt. Bowe Bergdahl's court-martial sentence and subsequent rulings on the case by military judges, setting up the possibility that he could request a reinstatement of rank or change of status for his dishonorable discharge. Senior Judge Reggie Walton, of the U.S. District Court in Washington, D.C., issued an order Tuesday that partially granted the federal government's motion to dismiss the Bergdahl case. But Walton ruled in favor of Bergdahl's argument that the Army judge in his case failed to disclose a possible conflict of interest -- that he had applied for a civilian...