It seems that most African Americans are voting him simply "because he's black".
Why are people so hung up on race these days? Just pick the better candidate!
People are hung up on race because race is still an issue. People are still discriminated by race, and people still feel judged by their race. Picking a candidate based on their opinions and stances on race is certainly a reasonable, logical choice.
Deciding which candidate is the right one in terms of race issues is a different matter, but race, itself, is certainly an issue.