In a long election season, it’s never wise to get too high or too low over any one poll. Presidential elections are won at the state level, but statewide polling is fairly sporadic at this stage of the race, so we’re stuck reading national polls a lot. But the latest poll is bad news for President Obama.
We all know the major issues by now to look for with individual polls: some polls are adults, and are totally useless, because only registered voters can vote. Polls of likely voters, in turn, are vastly more accurate and less Democratic-biased than polls of registered voters, many of whom also don’t show up to vote. Most polls are also reported after weighting to achieve some guesstimate of the partisan breakdown of the general electorate among Democrats, Republicans and Independents. Even polls that don’t feature egregious hackery are an inexact science, because they rest on the pollster’s current assumptions about the D/R/I split and the ‘screen’ they use to decide who is a likely voter. If the shape of the electorate is not as projected, the poll will be wrong.
Polling averages tend to be steadier than individual polls conducted over a few hundred respondents, and they show a tight race – the RealClearPolitics average shows Obama up 46.5%-45.1%, while the left-leaning TPMPolltracker average shows Romney up 46.1-44.2. Those averages smooth out possible outliers like last Friday’s jaw-dropping Rasmussen poll showing Romney up 50-43 among likely voters. And the averages themselves get more reliable as more of the pollsters start polling likely voters – right now, Rasmussen is virtually the only pollster reporting regularly conducted polls that is polling likely rather than registered voters. Looking at RCP, Rasmussen’s mid-April poll is the last likely voter poll showing President Obama in the lead.
All that said, the Obama campaign cannot be happy with the results of the latest CBS/New York Times poll – a poll of registered voters done by two organizations notoriously unfriendly to Republicans* – showing Mitt Romney leading Barack Obama 46-43. Some breakdowns below the fold.




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Steve Maley
Daniel Horowitz
Neil Stevens