One common complaint in the current conservative fusillade is that many 2012 polls are using the 2008 turnout model. Karl Rove, for instance, alleges that the pollsters are weighting their surveys to reflect the partisan and racial composition of the 2008 electoratewhen Democrats outnumbered their Republican counterparts by 7 points on election day. Conservative critics think the GOPs enthusiasm to oust President Obama means that differential will be a lot smaller this year. That might be valid, but the implication that polls are rigged to reflect the 2008 electorate is outright misleading: most of this years polls dont use the 2008 turnout model.
In fact, the 2008 turnout model critique is so far off base that responding to it simply entails explaining how polls work.
Most pollsters dont weight their polls to match a preconceived electorate. Instead, they take a demographically representative sample based on actual figures from the US census and then let respondents speak for themselves about whether theyre voting for Obama or Romney. For illustrative purposes, consider the Bloomberg/Selzer poll. They started by taking a sample of all American adults, weighted to match the demographics of all adults in the US census, like, race, education, and marital status. To produce a likely voter sample, they then would have excluded adults who werent registered to vote and then asked a series of questions to help determine who was likely to vote....
We dont need pollsters to tell us that Obama would lose if the electorate looks like 2010, nor do we need them to tell us that Obama would win if the electorate looked like 2008. What we needand what we haveare pollsters with methods that allow us to get a decent grasp on whats going to happen on Election Day. Pollsters are not sooth-sayers who correctly guess the composition of the electorate every four years; they take demographically representative samples of adults and let the sample speak for itself. Thats how polls using the same methodology managed to show Bush winning in 2004, Obama winning big in 2008, and a GOP takeover in 2010. Its how Ann Selzer managed to show Obama winning the Iowa Caucus in 2008, even though there wasnt any comparable Caucus to mirror as a turnout model. None was necessary.