Not every person thinks like people on this site think - people vote for a lot of reasons beyond the person with the right policies.
Okay, Atlas Democrats, would you vote for a Democrat with Vitter's character issues over a Generic Republican?
The obvious analogy is Bill Clinton, so clearly the answer is no.
It's not really hypocritical for a liberal to have sex with whomever they please. But, that wasn't the real issue with Bill Clinton. In 1992 a series of women stepped forward to note that they had had sex with Bill Clinton. Bill Clinton had the option of not commenting on the allegations, but, instead of his own volition chose to go before the American people and kinda, sorta admit his indiscretions [while continuing to adamantly deny the particulars of every accusation against him] as a humbled and repentant man who had "caused pain in his marriage." He vowed to never do it again. At that point, he was making a promise to the American people as to what his character was, and would be while he was President.
Turns out he was lying through his teeth. It was as big and as shameless of a lie as, "Read my lips! No new taxes!"
Relating back to a previous post in this thread, Miles stated that David Vitter "made" his wife and his son cut campaign commercials. Back whenever Mrs. Clinton and Mrs. Vitter first became aware of their husband's infidelities they would have been within their rights to leave. For their own reasons each decided to stay with her husband. One of the possibilities is that Mr. Vitter has in fact regained his wife's trust over the intervening years. If the Edwards campaign, or Miles, wishes to call her a liar, or claim she is acting under duress, then it/he ought to do so soon. Otherwise, it/he ought to take her words at face value.