Black/White

The Obama candidacy of of course brings up the issue of Race. One would hope that a person would vote on the issues, rather than their prejudices.
But this has got me thinking about it again. Mr Obama is considered "Black". But why? He is as much "White" as he is "Black", isn't he? I mean, if his father was "Black" and his mother was "White", isn't he equally Black and White?
When will we realize that God created only one race, the Human Race.