Here's something I don't get: Why should Weiner resign when David Vitter is still serving? Soliciting a prostitute is a crime; twitting your wiener is not. Demanding that prostitutes put you in diapers is kinky enough that most people can't relate; sexting is so common as to be almost beneath comment.

Is it because Vitter apologized right away? Is it because his party generally stood by him? Other factors?

Help me understand. Clearly there is a big difference between the two scandals, but I'm not quite getting it.