That is the result of 1 poll ,the last poll before the election .the average poll in that survey was only off by 1.7 % Rasmussen did well in their final poll,so did most other pollsters as the average poll was right within 1.7 % in their final poll.What about all the other polls that Rasmussen had McCain winning prior to their final poll when other pollsters where picking Obama months before Nov
From 2008 around this time Rasmussen- Mccain + 1 Gallup -Obama +3 Time -Obama +5 AP-Ipsos -Obama +6 CNN -Obama +7 CBS Obama + 6 IBD Obama + 5 OBAMA WON BY + 7 Rasmussen off by 8 points .All the other polls had Obama winning