How do you know?
I know a lot of registered D’s on the Trump Train.
From your keyboard to God's monitor.
There is a very good website with a ton of stats on it for North Carolina, www.oldnorthstatepolitics.com It has all of the voters broken down by age, race, etc. African-Americans are down compared to 2012.
Through yesterday, AA vote is 23.9%. It was 27.4% in 2012.
www.electproject.org/2012_early_vote
http://www.electproject.org/early_2016
I have a polling place right across street from my office. Been watching the lines. In 2008 and 2012 they were lined up like zombies, literally, to vote for Barack. This year not so much.