Please, gentlemen. The DoJ cannot effectively indict a sitting President simply because he has the power to fire anybody who does, then appoint a successor who will drop the charges. The proposition is absurd. The Constitution is quite clear that the President first answers to Congress ahead of all else.
The notion that a President can pardon themselves & remain in office is equally absurd. That's an impeachable offense in itself & an invitation for the SCOTUS to intervene. Other than that, the power of a presidential pardon is absolute.
Trump will either fight it to the end & possibly win or Trump & Pence will sit across a table from each other where Trump signs his resignation letter followed immediately by Pence signing a pardon post dated until after his swearing in ceremony. It's not like Trump could trust Pence at all.
Oh- taking Hope Hicks onboard AF1 is an obvious attempt at witness tampering, as well.