The GOPe has yet to understand, the only person who can destroy Trump, is Trump. They have had their way in previous years, withholding funds when a Republican says something that causes the liberals to feign outrage, thereby ruining otherwise good candidates. Trump doesn’t need their money, and it appears a good percentage of voters are showing that they are tired of elites in the party telling us who can run. The media, and party elites are simply showing us how out of touch they really are.
I honestly think the GOP wants to lose. It's been the minority party for so long, that it is more comfortable there, than being accountable.