Well, the only way it will kill it is if he is deemed by the GOP to be the people’s choice for presidential candidate and they don’t want him to be (which I assume they don't). If the charges were that he was visiting prostitutes or having gay sex, that would be different. Sexual harassment? Not a problem.
And it's a two-fer. They get to blame the story's genesis on "liberal" dirty politics.
....but hey, do what you want....you will anyway.