Not my terminology [1] [2].

Black is a culture in the US as well as ethnicity. Barack Obama identifies himself primarily as an African American/Black as does most of the nation. Don't see what's wrong.

[1] http://en.wikipedia.org/wiki/Black_people [2] http://en.wikipedia.org/wiki/One-drop_rule

That's what society sees him as. And what society thinks goes to a certain degree, because if society was advanced enough to see him otherwise, we wouldn't talk about ethnicity in general.

One of my favourite quotes, from a friend of mine (though I'm sure many others have said it), "We're all beige"

In the end, everyone is mixed, everyone is human.