OK, I'm not writing to defend adultery, or Bill Clinton. But you do know that lots of presidents, and lots of other politicians, cheat on their spouses, don't you?
If that's your standard, the effective result is that you are voting for the candidate best able to hide their behavior. You certainly don't have to condone this behavior (and again, I don't), but presidents of all political persuasions commit adultery.
http://www.washingtonmonthly.com/fea...607.benen.html
http://watchdog.org/31260/shno-presi...-infidelities/
Of course, it's not just presidents:
http://www.telegraph.co.uk/news/worl...-launches.html
Oh, wow, and the all-or-nothing view expressed in your last sentence! How do you rate Pope Francis? I assume his opposition to abortion and gay marriage meet with your approval, but his opposition to climate change and unregulated capitalism do not. Does that make him a scumbag? My point is that NOBODY is all good or all bad.