I think it will depend on who in the MSM and on social media start amplifying what he's saying and doing.
Oh, I know... And he does not have to have a platform - He will do exactly what he did last time. He will work to make every other contender non-viable. That makes him the only viable candidate, regardless of his awful record and phony promises.
And if that's the case, faced with a Democrat, most everybody here will vote for him anyway.
That's how it will go... I just don't think he has the poop to win it.