He already has his worshippers locked in. They have abandoned reason—or, perhaps more accurately, adopted a cult of personality that their morals and reasons revolve entirely around Trump the person. That's why Trump still leads in the polls: they just don't care. They've already assumed any negative press is a conspiracy, there are no better alternatives, that any legitimate alternative is a conspiracy by the Bushes/globalists/etc. (but Trump somehow is not).
Donald Trump is now at the point where he can reveal himself for who he is and no longer has to hide it. And remember: regaining the Presidency is not his goal. His goal is to remain famous, relevant, talked-about. If he wins the Presidency again, he fades into irrelevance after the term limits hit. If he loses, and can convince enough of his primary base that he was robbed, he can run again in 2028, 2032, 2036... all the way up until he dies.