-12 today? I think it was -15 yesterday. What's up with that?
This poll is controlled by the mushy middle, and the way its designed makes it prone to wild swings. To explain -
Lets say Obama is at -20, which indicates a 20 point gulf between very happy and very unhappy. Now, most polled in those groups aren't changing for anything - there are about 24% hardcore moonbats, and about 40% are smart enough to be against Obama's agenda.
That leaves about 36% in the mushy middle, who either somewhat approve or disapprove of Obama. Now lets say Obama says or does something that shifts the middle's opinion of him by three points.. three points leave the disapprove line, while three points move into the approve line.
So that three point shift reflects as a 6 point drop in this chart, bringing Obama from -20 to -14 overnight.
Of course the reverse is true as well, which is why Obama reclaims his -20 in a few days.
These data are also partly why I have been saying for months that -20 is pretty much the apex of this poll, because there is no budging the 40% who disapprove or the 24% moonbat index. And until Obama does something to personally affect the lives of the 36% in the middle, they will not take a solid enough stand to show up in this poll.