The Democrats cannot run a straight white man for President.
The Dems must have a minority on the ticket, either at the top or as VP. Obama could anoint Biden as an honorary black man.
I can see that in the near future but whites are still the majority and Democrats may have to make a deal with the blue-eye white devil if they want to advance to the next level of destruction.
To take back the White House, they may need a white man to beat a white man.