I don't think he would have used the infidelity excuse, but everyone associated is falling lie flies. Hillary leaving, an Admiral called in, conflicting stories from the CIA. It is something big and for big people to be falling on their swords, that usually means someone bigger is in deep.
Now you have your thinking cap on. This thing will make Watergate look like nothing. I predict someone with knowledge will "coincidentally" die before it is all said and done. Remember Ron Brown? And the other guy they found #$%$ up who knew Hilary?