It is a damn shame that Polls sway the public - and I think that's true. I have checked every poll that came out for the past few weeks to see how (or) if they over-sampled and under-sampled. They ALL DO.
The only one I actually trust is Rasmussen and I do not know why- because they don't tell you the demographic sample. I was surprised that (even) fox news oversampled Democrats by 6 pts this week... and undersampled Independents by 23 pts. CNN, I expect it = but not Fox. A lot of people are going to be shocked by the final poll on Nov 6th.