Or how about being really radical: make the president female. We only make up more than 50% of the adult population. She could be black as well. Or Irish. A female Irish parallel president would be a hell of a lot more suggestive of difference than the standard 50+ black male actor with lots of gravitas we had here.
* Especially In the Jungle, or whatever the song is actually called, and the fact that the cybermen were not extras in spray-painted diving suits.