Sen John Ensign (R-NV), conservative, born-again Christian, Promisekeeper, homophobe... has admitted to an affair with a staffer and states that the only reason he made the admission public is because she (yes, it was a woman!) was trying to extort money from him.
Ensign says he is resigning from his #4 Republican leadership role in the Senate. I didn't know there were even 4 Republicans left in the Senate.
If he were to follow his own advice, he'd resign from the Senate altogether.