Vitter asked to follow Ensign's lead and step down

Republican Sen. John Ensign of Nevada, a leading conservative mentioned as a potential presidential candidate, has admitted he had an extramarital affair with a woman who was a member of his campaign staff.
Now Louisiana Democrats are calling for Sen. David Vitter to follow his lead, pointing to the "very serious sin" Vitter confessed to after his name was mentioned in the federal investigation of the "D.C. Madam" prostitution ring.