this has a very interesting overlay chart showing how predictable the states are..any state more than 10% black populace goes to Clinton while white populace goes for Sanders.,currently there are many more whites than blacks:It's already over. You just prefer the fantasy.
https://www.washingtonpost.com/news/the-fix/wp/2016/03/05/the-hillary-clinton-bernie-sanders-race-is-becoming-very-predictable/