I like Real Clear Politics, because one, it's an amalgamation of polling which corrects for outliers, and two, they are a right leaning organization.Actually considerably ower than that.
RealClearPolitics: 38.9% approval vs. 58.5% disapproval
The New York Times: 38% approval vs. 59% disapproval
Silver Bulletin: 38.1% approval vs. 58.5% disapproval
The Economist/YouGov: 36% approval vs. 59% disapproval (a slight 2% bounce from late July)
Quinnipiac University: 32% approval vs. 58% disapproval

