With his landslide win he doesn't need any new voters.
But I bet he has...
If he has a war with one of our most-detested enemies, and actually wins it for the first time we've won anything in many, many years, he'll win re-election in a landslide, if he wants the job.
He's sure to have a war: every prez does. The question is, will he win or will he continue this depressing habit of our losing nearly every fight since the 1970s and taking a decade or more to do that each time.