Another tidbit to throw in the mix... While polls do tend to over sample Dems, not enough to have a huge impact with spreads like these, there is an undersampling of a group that will definitely vote Obama. All of the younger generation, 30 and below, that don't have land lines are not being polled. Nowadays many people only have a cell phone and since the majority of polls are conducted via land-lines, this demo is not being sampled. The point being that Obama may actually have a bigger lead than even the polls indicate.