These guys get a hard on from their special interest benefactors and that tumps their responsibility to constituents.
Every incumbent should be fired. But there is strong evidence to support that Americans are too dumb to know what's good for them and too full of their own pride to know how dumb they really are.
Example: the smartest person you know gets only (1) vote, maybe that's even you yourself. But step outside your office or home and there are 10, 20, 100 people, from Honey Boo Boo's momzilla to the bitch behind the counter at the DMV that cancel out your vote. Dumb people, crazy people, scumbags of every variety all get the same vote as you. And guess what ? There are far more of the, than there are like you.
Case in point: S Carolina just re-elected a congressmen that went to Brazil with his mistress after telling people, and his wife, that he was camping on Appalachian Trail. The guy lies on tv to a national audience, spend taxpayers dollars, cheats on his wife.....fast forward to election, breaks into his ex-wife's house, and he beats Colbert in the election?
BiG FAIL AMERICA. EPIC FAIL!!