Trump not winning any caucus is believable but not winning any primary? lol. Hopefully reality doesn't hit you guys too hard in the face in the coming months.
Trump may benefit in states with open primaries, where there could be "Operation Chaos" shenanigans (indies and Dems crossing over to hijack the primary and vote for Trump). But still, I don't see him winning much.
If you think Trump will only win because of Dems and Indies crossing over to vote for him, then you don't understand your own party's primary voters.