Relevant article. Ignore the dumb headline.
http://www.thedailybeast.com/articles/2014/11/03/is-this-the-beginning-of-the-end-for-blacks-and-dems.htmlThe trick for Democrats to get black turnout is to make blacks feel that their vote matters, and that if they vote their interests will be represented. This is true not only for black people, but for every voter. That's why turnout blew up from 105 million votes in the 2000 election to 122 million in 2004, to 131 million in 2008, and that 2012 stayed at 129 million.
When people feel that their vote matters, they will turnout. The Democrats did a phenomenal job in convincing black voters that their voices matter in 2012, 2008, and 1998, which is why they won. Having Bill Clinton (a "culturally black" President) and Obama (a half-black President) was a major motivating factor in convincing them of that. Now that he won't be on the ballot in 2016, the trick is for Democrats to convince blacks (and every other part of their coalition) that their vote matters in that election.