Does Obama look weak in the debates?

I don't know I was thinking about this and for some reason I think a 100% black candidate would have an easier time debating and dealing with racism then someone who is half white. I think they're a little more sensitive to stuff like that. But yeah a lot of her attacks seem to be directed at prooving he is unintelligent and it seems to hurt his feelings a little. I personally don't think it makes him look weak to me I think any human would respond the same way. It's like Eminem at the begining of 8Mile when the black bouncer is rude to him but the reverse situation sort of because Obama is still mixed.