You can say whatever you want about Senator Obama. Personally, I think that the little nicknames that opposing parties pin on the competition are demeaning and mean-spirited. That's why I don't use them, but feel free.

As for Michelle Obama, perhaps she's sick of the political system. Perhaps she's sick of how women and minorities are treated in this country, so she's finally proud. Perhaps she's exercising her right to free speech. Perhaps she's had thousands of words quoted and is being held to task for four of them. Perhaps there are things that she isn't proud of in this country (God knows there's plenty I'm not proud of) and is looking forward to being First Lady so that she can change that things she doesn't like.

I don't know Michelle Obama, so I wouldn't speak for her. I've never heard of the quote that you mentioned, so I wouldn't know where to begin.