I'm more worried about how divisive the race will be if they nominate her (black vs white). It'll allow the media machine to paint numerous "oh it's because she's black, isn't it" kind of rhetoric as a smear on the Republicans.
Reading this entire thread tbh has been a sad and worrying re-affirmation of my beliefs that we're all collectively "fucked". We literally can't put aside differences (myself included) and argue on facts and details, and instead resorting to tribalism.
The big reason we're resorting to tribalism, I think, is because of a peculiar element of human nature about wanting to "right" past "wrongs". So if me looking in from the outside, see the other side winning unfairly last time round, I'll support my side's wrongs despite them being objectively wrong (or what I don't even want) because I want to right the wrong of the past. That topped with the fact that the stakes are a whole lot higher each time means that neither side wants to "take one for the team" - because they know that if they did, the other side will just use the opportunity to the detriment of their opponents.