Chris Rock has a monologue which serves as a reminder for why Obama will not be the VP nominee. He boldly proclaims he’d shoot the President if it would make a black man president (at the time, he seemed to be talking about Powell). He figured he’s spend life in jail, but would be a rule the prison as a hero.
He was joking, but some might take the point he made seriously.
Oh yeah... that and the fact that the Democratic Party would never let one of their slaves actually run the plantation.
Eventually, they will not have a choice. Blacks and Hispanics make up 30% of the registered Dem voters. With half of the children in the US between the ages of 0 to 5 being minorities, minority voters will comprise more than half of the Dem party within the next 20 years. The thin veneer of white liberals will be unable to prevent minorities from getting their fair share of political power much longer.