Perhaps Obama has already turned down Clinton for Veep …
..because she`s not a white male?
I wouldn`t be surprised if Hillary hasn`t already dispatched some trustworthy elder statesman such as George Mitchell to sound out Obama about an Obama-Clinton ticket, only to have Obama say he can`t give Hillary the Veep slot because he needs a white male as a running mate.
No evidence for this, of course, just pure speculation ..