Just anecdotally, a lot of the black men in Georgia that I've talked to are not enthused with Hillary. Some say she's promising stuff like a typical politician, she's not Obama, etc.
Then you have idiots like Colin Kaepernick equating Trump and Clinton based on stuff she has regretted long ago
http://www.nydailynews.com/sports/football/colin-kaepernick-clinton-trump-proven-liars-article-1.2809883Plus, Sanders went completely overboard in tarring her, and to his most diehard, she is still the devil.
