(1) Your question does not respond at all to the comment made above.

(2) It's simply false to claim that apart from black voters "large majorities" have voted against Obama.  Obama won a majority of all votes cast - even if you include Michigan and Florida.  There are a lot of others in there, too.

If the Clintons were seriously courting black voters, there were any number of things they could have done, but didn't.  Ultimately, though, they faced the obverse of Obama's problem - Af-Ams were very proud that one of their own was being seriously considered for the Presidency.  Someone wrote the other day that when he won Iowa, it was like she felt for the first time that she was a full citizen.  (Please, by the way, tell me how Obama's smears of the Clintons as racist helped him win Iowa.)

Black voters supported Obama on their very own.  Nobody controlled their minds and made them do it.