They can deny, deny, deny on Bill’s abusive behavior, whereas that Trump tape is right there in your face. So even though Bill’s behavior is a thousand times worse, it can be shoved under the couch and ignored.
This is a kind of media-idolatry. The immediate, the flashy, captures the mind whereas any number of calmly propounded reports gets the doubt treatment.
Can Trump do something to turn this phenomenon to his advantage? Well he’s at least trying to do so.
Still, the fact that most of the people one would expect to be most offended here for actual reasons (evangelical and Roman Catholic Christians) are treating this as a nothingburger, has to be frustrating the lefties. They shouted fire in a crowded theater and the result was an orderly and diligent search for the fire and a conclusion that a cigarette is smoldering harmlessly in a wastebasket.
But still, yes, Bill and Hill have put out a lot of more colorful stuff, that doesn’t even have the mitigating factor of being in a drama show. Trump’s sound production folks are busy enough at this juncture, I bet. Trump will look like a choirboy in comparison, though the battle will be brutal.