[jamese777]

I already knew that, troll. The fact remains that you have have distorted the more accurate data by admittedly mixing in the inaccurate polling data. So now answer the question.

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National polls vary in their accuracy from election to election. For example, in 2008 for the presidential election, the Rasmussen Poll, generally the most conservative poll and the Pew Center poll, generally the most liberal poll tied for most accurate and they both got the national election result dead on. However there were 14 different polls that were within a plus/minus 3% margin of error on the election. Those are all “accurate polls.”

The data for this chart come from the Real Clear Politics summary on 12 November 2008.
Poll Obama McCain Spread Off by
Rasmussen Reports 52 46 6 0.5
Pew 52 46 6 0.5
GWU/Battleground 50 44 6 0.5
Ipsos/McClatchy 53 46 7 0.5
CNN/Opinion Research 53 46 7 0.5
Fox News 50 43 7 0.5
Diageo/Hotline 50 45 5 1.5
NBC News / Wall St. Journal 51 43 8 1.5
Gallup Traditional 51 43 8 1.5
IBD/TIPP 52 44 8 1.5
Marist 52 43 9 2.5
ABC News / Wash Post 53 44 9 2.5
Gallup Expanded 52 43 9 2.5
CBS News / NYT 51 42 9 2.5
Reuters/C-SPAN/Zogby 54 43 11 4.5

[Brown Deer]

You admit that the Rasmussen polling is the most accurate. So, that is why most of us ignore the other polls. For example, Bloomberg shows a 22 point difference between what they report from the more accurate Rasmussen poll, yet they report a Margin of Error of ± 3.1 percentage points.