Broke my own rule and looked at the polls in question, those giving the highest difference (including FOX) had less than 1000 people and only did “RV” (registered voters)every one with a drivers license id a registered voter for Christ sake. Likely voters have a track record of voting in previous elections. RCP is so unscientific it is ridiculous. To make matters worse in every poll Obama’s numbers are with the margin of error. Not good for an imcumbent.
RV v. LV is the key to understanding these polls. Among LVs Romney is polling significantly stonger and probably is winning the PV and EC. Now consider that the Romney (or better put, the anti-0bama) LV is probably a certain voter. This means the the 0bama GOTV/voter fraud effort will have to run at peak to avoid defeat.