If we take away academics and youth as unlikely sources of votes, you are still left with sizable numbers which leaves you scratching your head. I also cannot see how pure pragmatic libertarians could get past his massive and often comical stupidity and can only surmise that they tolerate him rather than espouse the alternative. Still, that level of nose holding must be quite the challenge given the fact that I am hard pressed to think of another current world leader with such a plethera of attributes which disqualifies them from holding such high office. We can speak of despots like Putin, but he is less imbecile than cunning and immoral killer.
Yes, the Mueller report will eventually be released or leaked and a more accurate picture of the Trump crimes will emerge, but that doesn't solve the problem of the continued high level of support this man continues to receive.