From today's Wall St. Journal, which most people would consider conservative:
"Gallup explains it has what it considers a time-tested formula for determining most likely voters. It asks eight questions, such as current intensity of interest, past voting behavior and interest, and whether you know where your voting place is.
"We've discovered that if we ask a set of more indirect questions, we can better predict who is or is not likely to vote," Frank Newport, editor in chief of the Gallup Poll, has said.
But there is reason to suspect those criteria are outdated, especially in an election where both sides say the intensity level is much higher than four years ago and get-out-the-vote organizations are considerably better than ever -- few people on Nov. 2 will be in the dark on where the voting polls are.
"A formula that made sense years ago may not recognize all the changes in society," notes Mr. Hart. "It gives more credence to past behavior and too little to current interest.""
The problem with Gallup is that while it was once respected, it hasn't changed with the times. As mentioned up-thread, the results are weighted with Republicans. In addition, this poll had a small sample size -- only 800, which pushed up the margin of error. And this is only a phone poll. Alot of younger people, myself included, rely solely on our cell phone, which we never receive poll calls on.
I would suggest you look at Zogby polls, which seem to be taking a better cross-section for its polls. Zogby combines traditional polls with email polls to get to a larger group of voters. And generally, because of their larger pool, they have a smaller margin of error.
Gallup is one of a few respected polls -- others include Zogby and Harris. Both of those polls have the race in a dead heat. Gallup is an outlier and they need to change their polling system or risk looking like a bunch of idiots come Election Day.
And of course, this is a national poll. National polls are a waste of time in this election. Because of the closeness of the race, it's all about the state polls.