I think the McCain strategy of the last couple weeks is having some backlash in ways they didn't anticipate. In the past whenever the republicans employed these tactics it was more insidious, more like whispers and code words to convey their message of fear. But what you've seen coming out of these rallies and on the web is frightening racism. Even someone who has misgivings about black people is going to be repulsed by what they've seen coming out of the mouths of these supporters.
I also think that although race is still a huge issue in U.S. politics the McCain campaign is overestimating the populous view of Obama. If people saw him as a black person first and a candidate second it might have worked but people have a tendency to not always associate people with the groups they discriminate against. (ie, Will Smith, Michael Jordan, etc.)
Also, just saw John Voigt on MSNBC. I had no idea how batshit insane he is. No wonder Angelina wants nothing to do with him.