>>Can you say floating a trial baloon?
>
>Al may be right about setting the stage for 2016. ... And VPs are historically unlikely to be elected President four years later.

Very similar to my first reaction, more on the second part than on Al's idea, as this seems to more about Mitt than about her.
It would raise Rep chances by a lot, even if a larger part as usual would see the counter to the current P/VP pair
Third reaction was: black and female in one package after black P and female VP ? Unclear in my vision...