By damage I mean negative coverage and disgrace with little political advantage. Nancy Pelosi has a terrible image, but she achieved a lot of policy success so won't count.
My list:
On Dem side, the top 3 would be Omar, Talib, Cori Bush. AOC has more media coverage but seems normal in comparison.
On GOP side, the top 3 would be MTG, Boebert, Gaetz.
For Senate, it would be Menendez, the most corruptive senator. But since he is so uniquely corruptive, I am not sure how much damage he made for the Dem image. On GOP side, I would say Graham (chameleon), Tuberville (extreme and stupid), Vance.
I don't see how Vance hurts the party? He has good optics and while he's certainly conservative, he doesnt say crazy stuff.
