As he should. Once out of office he should go door to door and apologize for his lies and the shattering of the trust his supporters put in him.
Indiana Rep. Mark Souder to Resign Amid Allegations of Affair With Staffer
Some will say he made a mistake, which he did. More than just a mistake he has distracted from important debates about our future by living the lie of being a "family values" representative of the people. Now he needs to pay for that mistake before he can begin to rebuild his life. Good.