I suspect the causes are Obama’s ineffectiveness dealing with terrorists and the oil spill.
I think his supporters don’t have a lot of juice left in their batteries and any disappointment is too much to take.
I wonder if people still aren’t able to reconcile the man and his policies. “Sure, his policies are kinda out there, but he’s not really an a—hole - he’s a nice guy.”
Then, reality hits after awhile.