(1) he has to stay alive until then

(2) he has to overcome an absolutely massive approval deficit

(3) he has to be able to run a credible campaign

(4) he has to get around the term limits

(5) I would expect there to be a fairly large number of people to be very upset if he did

All in all I don't think his chances for re-election are > 0. But I agree with you that he might try, by hook - or by crook - to hold on to that chair.