He's Barack Sr.'s other mixed race son. Notice that he doesn't look much like Barack Sr. either. Pronounced racial characteristics don't carry over when people of different races intermarry. If his mother had blond hair and blue eyes the child wouldn't have those either. I'm not saying that Sr. and Jr. are definitely father and son, but they could be.
Go to totallylookslike.com. You'll find plenty of pictures of celebrities who's pictures can be morphed or mashed or smoshed together to produce animated gifs or jifs that somebody will be sure proves that they are related.
