Could be a Rand third party.
I think Trump would only go third party if he per eives that he is not being treated fairly. This whole phenomenon is not Trump fever, but people kinking the establishment in the butt. Trump will fail miserably as a thirds party candidate, because he will have eventually failed as a GOP candidate.
Any third party candidate even remotely from the right (or considered so) fails miserably as a candidate, but assures a Dem stays in the White House. Trump's larger than life ego is growing daily. The attention he gets spells doom for the Repubs.
It's too early to get up in arms about this. Besides, Jesus is in control.