That is the argument that her hypothesis is unable to overcome.
Obama at one point had over 50% favorability rating. I find it HIGHLY unlikely that some of those supporters saw a picture and said "ZOMG he's black?" and changed their vote.
So that means something else is happening. The media barrage explains a lot of his decrease in favorability ratings.
I argue that it is simply because he was an unknown commodity.
I believe part of Obama's slide in the polls is due to the way he prevaricates on hard issues. Of prime example, when he was asked about when human rights should start, he came out with the lame "That's above my pay grade." Sorry, but what a fucking wimpy answer is that? He DIDN'T answer in a definable way because he is too busy pandering to the middle, while figuring - correctly - that the hard left will vote for him anyway, just to keep McCain from winning.
But I don;t think that method is working well for him. He has a record people can see (and if not - be openly reminded of by the McCain campaign) on these issues. So when he prevaricates like that, it makes him look wishy washy - which does not play well to the very middle folks he is trying to pander to.
OTOH, McCain talks tough. It may (and does - especially the hard left) piss some people off when he does so, but it is also appealing in a leader when they come across as decisive. As an instance, when asked the same question as Obama, he said it out flat "At conception." That is obviously a stance that will piss off a WHOLE lot of people who disagree.
BUT at the same time, it is decisive and tough, which in the end appeals to people - even some of those who disagree with it, but have abortion as a low priority issue.
According to a poll done by Rassmussen in 2004, the majority of independent moderates - who again will be the sector that determines this election - mostly look for leadership in a presidential candidate. When a candidate makes decisive statements like McCain keeps coming out with, they see a leader. When a candidate comes out with the types of statements Obama makes on issues like abortion and gun control, they see an indecisive wimp. The end result is many will support a leader they disagree with on some issues over someone they see as indecisive (thereby not really KNOWING if they disagree or not.)