Opponents of Matt Whitaker's appointment as acting attorney general opened a new legal front Friday in the fight over his selection, asking the U.S. Supreme Court to rule that he is not legally qualified for the job. Donald Trump appointed him on Nov. 7, shortly after Attorney General Jeff Sessions announced that he was stepping down at the president's request. Whitaker had been serving as chief of staff to Sessions. The challengers asked the justices to rule that the name on the case should now be Rod Rosenstein, who they said is actually the acting attorney general.