I'm an anti-Trump voter BUT I don't think that Trump's comments (about K. Harris, at national Black journalist meeting) were particularly RACIST. Racism would be to say, "because she's Black she's stupid" or unqualified or whatever. His comments were factually inaccurate -- bluntly false, IMO, or (perhaps in the opinions of his supporters) merely the type of hyperbole that is usual in political campaigns. He was pandering to his base, rather than trying to win new supporters. It was a bad setting in which to try to pander to his base. But this idea that he's somehow BIGOTED about her is a different idea, only vaguely supported by his comments.
To me, it's basically this. "OK, I'm Trump and I'm going to go say the things that people like for me to say, when people like me. The people who like me, like me to say these sorts of things. So here are these things." Thus, it makes the statements poor choices (these weren't people who would approve of those statements) and it makes clear what sorts of people he would prefer to be pleasing (his base). But it doesn't suggest that he's stupid enough to think that Harris is incompetent, to the point of incapable of winning an election, strictly because she's Black (or Indian). People in politics know, don't underestimate the opposition. Trump didn't.