Three Senate Democrats filed a lawsuit Monday arguing that Acting Attorney General Matthew Whitaker's appointment is unconstitutional and asking a federal judge to remove him. The suit, filed by Sens. Richard Blumenthal of Connecticut, Mazie Hirono of Hawaii, and Sheldon Whitehouse of Rhode Island, argues that Whitaker's appointment violates the Constitution because he has not been confirmed by the Senate. Whitaker was elevated to the top job after Jeff Sessions was ousted by President Donald Trump on Nov. 7. The Constitution's Appointments Clause requires that the Senate confirm all principal officials before they can serve in their office. More from the AP: