So to sum, in order for a Trump supporter to regret their vote, their drop in faith in Trump would have to be substantial enough to (1) overcome the fact that Trump won, (2) overcome their own hesitating at admitting a mistake, and (3) overcoming the fact that Hillary lost.
Finally, after being tarred and insulted as "deplorables" who are "ruining America" for years, admitting that they regretted their vote would be a humiliating concession that the people calling them these names were, in some way shape or form, right, even if not in their direct attacks. For that reason alone, Trump voters may resist reevaluation.
I agree with your points here, but I also think it's worth emphasizing the qualities of Trump himself that would compel his voters to remain loyal to him. Politico recently posted an
article that I think crystallizes the reasons that a significant chunk of his supporters are immensely happy with him. They see him as someone who is willing to stand up for them and their values, and restore the vision of America that they feel has been slipping away from them. They wanted a strongman in what they perceived were desperate times, and in Donald Trump, they have one.
