File under: Methinks thou doest protest too much.
Democrats know they can't run on an anti-corruption platform without risking a deluge of corruption probes that will uncover a host of misdeeds.
Partisans of either stripe will tell your their party is the clean one and the other one is dirty to the core. Designed that way.
Sane people realize that your time in Washington is directly proportional to corruptability. The longer you stay, the better you know how to game the system to your advantage. The real crime is not what is illegal, but what is legal.