Who you crapping? The whole GOP is the Party of Trump these days in case you missed it. There are people who specifically like him because he doesn't act like an emo wuss boy and does act like an asshole. See Truth/Dom/Roll Booth Willie. (Imagine how Spark would lose it if Trump was posting here.)
If 100% true - then the GOP has shrunk, which is not the same syntax as my point but makes my point.
Chris Christie only needs to peel off 5% of the original party. Of course, it will be interesting to see what he does when Trump is the nominee, will he just fold his cards and say "Trump is better than Joe Biden"