Forgive my lack of sauce as this is just a hunch on my part.
This immunity deal with David Pecker, though sounding more insidious for POTUS is leading me down the road that POTUS has not been with either Stormy or Mcdougal. I think both of these women are part of the show and in the end our POTUS will have some sort of alibi or solid proof that he has never had affairs with either of these women.
Then the left will have almost nothing because this seems to be all they have.
Of course this is just my opinion. But would make alot of sense.