Barack Obama Is A Black Man

That's what the media tells us. They never refer to him as African-American. He is the child of a black father and a white mother. To me that means he's ½ and ½. Yet it is always said that he can become America's first black president. Does being half black make him black? Does it make him not white? If his black father was a child of a mixed marriage thus making Barack ¼ black, would he still be referred to as black? What percentage makes someone black?

I have a cousin (white) who married an Asian woman. They have two children. The boy looks very Asian yet the girl looks very white. Do we go by looks alone and call the boy Asian and the girl white?

I don't know.