Newt Gingrich was having an extramarital affair even as he led the charge against Bill Clinton over Monicagate. That is to say (for those of you who are keeping count) that he was cheating on his second wife with the woman who would eventually become his third.
Newt and Rudi are both serial adulterers. So, it certainly seems, is Bill; but at least he's managed to keep his marriage going, even if he has had trouble with the vows. McCain's first wife raised their kids while he was a POW; this did not keep him from cheating on her and divorcing her (for a drug addict beer heiress who later stole meds from a charity she worked for).
I've got a sense that the GOP isn't trying anymore. They figure that, if the public puts up with a recovering alcoholic who talks to God and hears that torture is okay, nobody much cares about traditional values anymore. And by gum, they may be right.