Unless the Dems run another Black candidate, the Blacks will return to their pre-2008 voting percentage. Maybe it will be less than before, since they will feel they are owed a Black candidate.
By 2016, the way Hillary is aging, there won't be enough plastic surgery available to make her presentable. Up against a young, vibrant R-candidate, she will look like an old hag. Remember what the televised debates did in Kennedy/Nixon. Furthermore, enough of the truth will come out about Benghazi that she won't be able to spin it. I'm going to go out on a limb here, and say that she won't even run.
I'm also hopeful that enough people will be fed up with the Obamanation, high unemployment, outrageous taxes & insurance costs, etc. that it may just be a walk in the park for a Republican.