While I'd like to believe that Democratic public figures are better in their marriages & personal lives than Republicans I doubt that is probably true to any great degree.  What I do believe though is that Republicans have set themselves up for these types of failures because of who they position themselves to be.

• I believe that Republicans are greater targets for journalist or the general public because of the hypocrisy involved.  If I see a "promise keeper" at a hotel with a young woman I'm probably more likely to find it news worthy than someone who had not made a living by demonizing others moral values and claiming the high road.
• I also believe that Republicans are more likely to do really stupid things to try to avoid attention again because they don't want to get caught in their hypocrisy; which of course in the end brings much more attention on themselves (example: vanishing for 5 days).

Please don't take this as a "poor Republican's" post, I'm not the least bit sympathetic because they are complete hypocrits and have and will continue to do this to themselves.  As long as the are the party of the Christian Right and pretty much nothing else this will continue to be the cycle we see.