The indispensable Nate Silver of www.fivethirtyeight.com takes on some questions about recent polls and supposed shifts in voter ID. Since the Republican National Convention, there has been a noticeable bounce in both overall support for John McCain at the nationwide and state level, as well as an increase in voter ID for Republicans. The sudden increase in those identifying themselves as Republicans has led some to doubt the accuracy of recent polls showing a McCain edge. One possible explanation for the spike in GOP responders is simply response bias — a greater willingness at this point to answer polls because they feel more excited about their ticket. In any case, Silver answers some questions about voter ID issues today.

It’s important to remember the unreliability of polling data, especially with so much time left in the campaign. The likelihood is that McCain is, in fact, doing better than two weeks ago. If the election were held today, there’s almost a 50% shot he would win. But with four debates and almost two months of campaigning left, anything can happen. In addition, what the Obama campaign is really looking for is a path to 270 electoral votes, not a lead in the national polls. If Obama can hold on to the states that Kerry won and win any three of the following six: New Mexico, Colorado, Iowa, Virginia, Florida, and Ohio — he will reach the needed 270.

Tags: 2008 Presidential Election, McCain, Obama, Polls

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