Ron Elving, senior Washington editor, NPR
Ken Rudin, Political Junkie, NPR
Eliot Spitzer, former New York governor and host of Viewpoint on Current TV
Former South Carolina Gov. Mark Sanford won the GOP nomination for the state's first district congressional seat Tuesday. Sanford's return to politics comes four years after revelations of his extramarital affair in 2009. Sanford isn't the only disgraced politician to make a comeback.