Obummer absolutely detests even the thought of Shillery. There is no way that he would pardon her for anything, plus the fact that he blames her directly for messing up all of the plans.
It has never been attempted, but the justice department has opinioned before that a President can not pardon himself of an impeachable offense. Nixon explored that possibility but it was quickly shot down. Obummer being as narcissistic as he is, would not pardon anyone else if he himself had to face prosecution. If any of the individuals involved had pocket pardons, they would have already produced them to stop the investigation of them dead in their tracks. I think the field has been set and we will simply have to wait until the start of the game.