He just isn't a Republican. That's why his message, etc. is so mixed up and baffling- he simply doesn't know who HE is. Honestly, he would do much better being a Dem than a Republican. If he's the only one who can beat Hillary, then have him do it as a Dem. THEN let the country choose between him as a Dem and an honest to goodness Republican.
Your point is reasonable- but I’m still baffled:)