Because 24% of the population either lives off some form of Government, only sees his skin color or is mentally handicapped.
Its because he still holds 90% approval of the people of color.
I guess I understand why that is, but I doubt very much if they will get the vote out in 2012.
My guess is the television ads in states where there were primaries were in high gear this past week. Thus the sudden change in polls (huge swing in the last week.) The new Fed policy, the booing of the boy scouts, and the continued problems with Waters and Rangel will not help over the coming weeks.
We see -25 by September 1.