<Trump's base will believe everything he says to the bitter end>
I'm not sure they do believe everything he says. I think they are perfectly ok with his lies. For instance, I think almost no-one believed anything Wimpy said about healthcare. His 'base' -- those who would give him a pass even if he shot someone on Fifth Ave. -- didn't support universal healthcare any more than he did; they recognized that he was lying about it in order to "expand his base." Certainly those who voted against him knew he was lying about it; they recognized that he lies about everything. 
I'm interested in the voters who were not part of the base, but who bought into the lie that Wimpy knew something about healthcare, that he cared about it, that he cared about them; who actually believed the lie that he had a plan to simultaneously repeal the ACA and replace it with healthcare for everyone, with better coverage and for less money.
Every word Trump has ever spoken about healthcare has been rooted in lies.