http://www.rasmussenreports.com/public_content/politics/general_politics/november_2010/what_s_up_with_nevadaMore at link
While public polling generally gave a good projection of what to expect around the country in Election 2010, that was not the case in Nevada.
Rasmussen Reports' final poll on the race showed Senator Majority Leader Harry Reid trailing by four points and the Real Clear Politics average showed the Democratic incumbent down by 2.7 points. When the dust settled, however, Reid won by 5.6 percentage points.
After every election, polling firms review the things that went well and those that didn’t to learn and make modifications. In this process, Nevada seems like an ideal place to start. That’s especially true because it’s the second straight election in which the Democrat has substantially outperformed both Rasmussen Reports polling and the average of all public polls in Nevada.
In 2008, President Obama won the state by 12 points and outperformed the average poll by six points. Rasmussen Reports had shown a four-point edge for Obama. So it seems as if there is something substantive that public pollsters are missing in understanding the Nevada electorate. However, the misunderstanding is fairly recent. Both Rasmussen Reports and the public polling averages did very well in the 2006 Nevada governor’s race and the 2004 Bush-Kerry presidential match-up.
At Rasmussen Reports, we began by comparing our results to the exit polls to see if there were any obvious clues. Our final poll showed Obama’s job approval in the state at 44%, while the exit polls found 45%. Our final sample had 39% Democrats and 35% Republicans, while the exit polls showed 35% Democrats and 33% Republicans. Their final numbers showed 32% not affiliated with either major party, while we showed 26%. None of those variances would explain the difference in projected outcome.
Our final numbers showed that 76% of voters would be white, while the exit polls showed 72% white. This could certainly account for some of the difference between the poll and the actual results, but not all. It also confirms the sense that the Reid campaign did a good job of turning out its base.
One discrepancy that really jumps out, however, are the results among unaffiliated voters. The Rasmussen Reports numbers showed Angle winning these voters by more than 20 percentage points. The exit polls showed her with just a four-point advantage. This strikes us as an especially significant clue because the Angle poll numbers in Nevada were not out of step with the preference of unaffiliated voters for Republicans around the country.