Campaigning in Mississippi!? Is he doing that bad there?
It's not outrageous to believe. The demographics could swing MS in the future, and Trump is no Generic R.
I've come to believe analyzing Trump's campaign movements in the way one would analyze a normal campaign's strategy is a fool's errand. Trump does things on a whim. He could be leading by +50 in Mississippi and he'd still send his son there for the hell of it, and then brag on Twitter when the rally had lower-than-expected turnout.