Breaking down the powers of a grand jury as DOJ allegedly investigates Gavin Newsom: California Gov. Gavin Newsom and his wife are the latest White House adversaries to claim they are now under investigation by the Justice Department. The DOJ has not commented on Newsom's claim. The alleged investigation has raised questions about the powers of a federal grand jury. CBS News legal contributor Jessica Levinson breaks it all down. #GavinNewsom #JusticeDepartment #GrandJury #DOJ #LegalNews