http://www.theatlantic.com/politics/archive/2011/09/ron-johnson-called-social-security-a-ponzi-scheme-and-won/244753/Feingold - the only Senator with the good sense to vote against the Iraq War and the Patriot Act.
His quote in a campaign ad -
"Guess what's coming in Russ Feingold's negative campaign? He's going to tell you I said Washington treats Social Security like a Ponzi scheme. You know what? I did say that -- 'cause it's true. Russ Feingold and politicians of both parties raided the Social Security trust fund of trillions and left seniors an IOU. They spent the money. It's gone. I'll fight to keep every nickel of Social Security for retirees, and I respect you enough to tell you the truth."
Not only did Johnson depict SS as a criminal scheme - he lied by saying the Trust Fund is "gone".
And he won against a far better man.