Sharks Are Circling Around Vitter

Wow, I figured that the "It's OK If You're A Republican" rule would apply to David Vitter, but now that the revelations are expanding, Republican lawmakers in Louisiana are calling for Vitter's head, and even casting around for a replacement (and trying to force the Democratic governor to appoint a Republican one).

Lots of people commit adultery; most of them are running for the Republican nomination for President. Why is Vitter's adultery somehow meriting a resignation?

Could it have anything to do with diapers?

UPDATE: With Vitter in Giuliani's stable, McCain supporters have taken to soliciting sex in a men's room to catch up in the all-important sex scandal race. "We cannot afford a sex scandal gap!" exclaimed Gen. Buck Turgidson McCain, probably on his cell phone in the Capitol cloakroom when he was illegally engaging in campaign activities on Senate grounds.