Once the Congressman refused to stick it out any longer, punditry tried to erect a whole series of straw man reasons, both for blame or justification, arguing that Weiner was treated with a double standard. Viewing Weiner's resignation as either unnecessary or unjust, the opinion class claimed that he either wasn't as bad as other examples, or that he had done nothing illegal--therefore his punishment was far more exacting than his crime.
While some of this is true, it still matters not. Anthony Weiner made his own decision to resign, it was an appropriate decision and the likes of Bill O'Reilly and Rachel Maddow both need to think through their positions on this a bit better.
For the seemingly 5017th & 5018th times, since the climax of this scandal both hosts felt the need to invoke, once again, the name of David Vitter. Claiming Vitter's sexual scandal a double standard to Weiner's. O'Reilly went as far as to label it, "much worse" than the transgressions of Weiner. Maddow implied double standards as some sort of castigation against the GOP.
But the long story short, David Vitter and Anthony Weiner, are two very different men--with wildly different scandals.
The only reason the public ever knew about Vitter's scandal was due to the fact that Hustler magazine had Vitter's name on a hit list of sorts and his number turned up in a DC Madame's black book. Hustler's intention was to mar the public name of the Senator that had dealt extensively with family values issues, and had run at the endorsement of family value's organization on the federal and state levels.
The reason the public knew about Weiner, was because he took pictures of his sexual organs and transmitted them to the public, and in a yet-to-be-legally-determined manner of possible sexual harassment to women he cruised his twitter feed for. He then lied wildly about it. He also wasted broadcaster's and journalist's efforts in granting interviews in which hid the growing truth.
When contrition came for both men the circumstances were wildly different as well. Vitter had confessed to his wife, members of his church, and others of his behavior years previous to the revelation. At the time his wife made a specific decision to approach her relationship with her husband as "not holding natural consequences against him as the offender." In modern terms this is called forgiveness. But the point is that the issue was resolved long before it became known.