Probably to resign and promptly move to Russia to avoid the charges of treason that are surely to come over the Mueller investigation is over.
probably to fire Rosenstein. If we learn anything from recent history, it's that when enough information is leaked to suggest that someone in the admin will be gone very soon, and especially on a specific day, then that person will certainly be gone, and the delay in doing so is only ever as a response to the reported day, is if it proves the media was wrong all along, because well, the people that trust this treasonous administration are fucking idiots and will believe it.