He has to return to the "homeland" and develop a little hyphenated-American credibility. He's as much white as black but only seems to acknowledge the black half. Of course, that's the half Democrats pretend to care about so it makes sense.
I would say that you have hit on something. Maybe he is ashamed of his "whiteness" and is hiding it for political purposes! 50 years ago blacks tried to pass as whites and in today's world being black is where its at.