"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus
Or, perhaps oversimplifying, reduce the nine point spread by 60%, representing the difference between the 10 point Dem lead in the poll to a 4 point Dem lead reflecting a much more realistic spread based on past election data in Presidential elecitons. This translates to a 3-4 point lead, which is probably much closer to what it actually was during the four days that were polled (9/18-9/21).