Former Rep. Anthony Weiner, D-New York, resigned from Congress in 2011 after being embroiled for weeks in a sex scandal linked to his lewd online exchanges with women. Weiner recently announced that he will run for mayor of New York City. "I hope I get a second chance to work for you," he said in a video announcing his campaign. Despite taking knocks from the press, the voters and, in some cases, the law, other politicians have pursued redemption in their public image or, in some cases, a return to office.