According to this blogger who has been a researcher for various publications, Obama is not a negro:
Why is the fact that Mr. Obama is only 6.25% African Negro not reported? Because to acknowledge it is to report this devastating truth about him: Mr. Obama is not legally African-American. It is impossible for him to be, in truth, America's first African-American president.
Federal law requires that to claim a minority status, you must be at least 1/8 of the descriptor, but for the sake of this article, I've converted it to a decimal fraction for easier comprehension. You must be at least 12.5% of the racial component you claim for minority status. Mr. Obama, claiming to be African-American, is half the legal threshold."
http://kennethelamb.blogspot.com/2008/02/barak-obama-questions-about-ethnic.html
Have you ever seen a picture of Obama’s father? There is no way he is only 1/8 black. Arabs are Caucasian racially, keep that in mind.