It seems, though, that telling the truth doesn't work.

Trump's supporters must be at least periperally aware that he has told in excess of 25,000 documented lies during his time in office.

The only thing that seems to vary among those that I've heard interviewed is how they justify continuing to believe him. Whether they scapegoat the "lamestream" media (for misreporting him, mischaracterizing his position, or lying when they fact-check) or, if you happen to hit upon a lie about something that they've "researched", a convoluted bunch of (mostly parrotted) reasons why Trump is correct.