Earlier quoted context omitted.
They're orthogonal, so there's no barrier. They're all nefarious, and most are also incompetent.
Getting yourself installed as president while knowing you are incompetent (I mean, look at all those bankrupt businesses, he should know) is nefarious in itself. His entourage is nefarious for supporting the incompetency for their own gain.
Everything since has just been an inability to admit he was in over his head, plus trying to get out of trouble for all the crimes he did. He (and Clinton) just underestimated how susceptible the US was to a demagogue. If you look at his face after the win was announced on election night, and after the first meeting with Obama for the transition, I think it shows plainly on his face.