Other than new-voting teens, I don't see many people in the second group... and really large numbers of people (and many of then very very eager) in the second group, from all walks of life.... rich, poor, liberal, old, young, retired...
Only the media and voter fraud can keep this close, and I'm not sure either can be done enough to save Obama's position.
I know a lot of folks disdain FB, but it is a great indicator of what people are saying/thinking/doing. My friends list represents a good cross section of America, literally. Before it was about even Left or Right. Now it is about 80-20 Right to Left..
The biggest things that seems to have swung the meter? The Obama flag, media bias, and believe it or not, the faux war on women. And all of these are fairly recent things..