My take:
Obama jumped the shark when he insulted the intelligence of so many Americans in his Philly speech.
A 20 year close friend of Wright's, and a member and financial supporter of a black racist church (not uncommon in large cities) - for 2 decades, but he had no clue about the anti-whitey, anti-American stuff?
I don't believe most people think Obama is racist - tho I'm sure many more do now. I think he is just a politician, maybe naive, who went where the votes were in that community, but stuck around too long.
His unpardonable sin is expecting Americans to buy his load of steamy crap regarding this. One thing I will give him tho, is he had no choice but to take this tack. Otherwise he is either a closet racist (wife too) or he is too naive, lacking in judgement and to prone to accidents to lead the most powerful country in the world - in spite of being the smoothest speaker we've heard in a while.
The black power people, the extreme left and the hard core socialists who were strongly supporting Obama probably still will, but what Obama lost is everyday middle America.