He wants to be treated like a Negro, instead of the privileged white patrician he really is. I'm guessing he means he wants to be treated like Cynthia Mckinney and William Jefferson. Fill that man's glass!
More: David Codrea at the War on Guns is more explicit about the Congressman's wish to be treated like a black man:
I say give him what he's asked for. Take him out to Anacostia at 3 in the morning and treat him like he's black.Those Kennedy boys, always good for a laugh!
Just make sure to bring a throw-down piece and claim he went for his waistband...