More stupider. Well, DUmmies, you, for starters. It's "stupider", or "more stupid".
But if you want to confine your replies to simply the halls of Congress:
--Hank Johnson
--Maxine Waters
--Shelia Jackson-Lee
--Debbie Wasserman-Schultz
--Nancy Pelosi
--Barbara Boxer
--Patty Murray
(seeing a pattern here, kids?)