Forget about trying to have a "big tent". You're all about exclusion, so stick to what you know best. Throw out all the "moderates" and become a smaller, purer GOP. Let the New England GOP Senators become Democrats. You don't need them. All you need are the dittoheads and loons and authoritarians. That's a guaranteed constituency of 25% of the population. Don't risk alienating that solid base by trying to be less crazy in order to attract votes from nonlunatics.
If the last eight years taught you anything, it's that you can't govern. You might as well embrace the role of crackpot opposition party.