I'm afraid for race relations if Trump wins. I'm afraid that with all of the progress this country has made with regards to race relation that gets swept under the rug seemingly, that it will give an excuse to say "see! told you this is no different than the days of slavery".
That is my concern. I feel now, even though people sometimes act like USA is some slave driver country that has made no progress (which is not only a lie, but really damaging to potential further growth), that Trump will give people the talking points they need to unravel any progress there.