In British politic, candidates go to great lengths in stressing their upper class upbringing. In America, Democrats strive to be in extremely close alliance to Black Americans-Bill Clinton actually thought he was Black.
I doubt whether any person of color would be considered by Black Americans unless their forefathers felt the task master's whip. They learnt their lessons when they choose Obama, son of a white mother fathered by a Kenyan- a non-American.
I doan think Blacks are going to make the same mistake twice.