http://www.rasmussenreports.com/2006/State%20Polls/July%202006/washingtonSenate.htmAccording to Rasmussen, this poll was conducted on July 17th, 2006. While this is after Rasmussen's last poll that gave Cantwell only a four-point lead (and which is where Rasmussen is conducting its analysis about Cantwell's bump), there were two polls conducted after this one, but released before Rasmussen released its own.
Zogby and the Wall Street Journal did their monthly polling blitz, the results of which can be found here:
http://online.wsj.com/public/resources/documents/info-flash06.html?project=elections06-ft&h=495&w=778&hasAd=1&mod=blogsThese polls were conducted over the course of five days, and wrapped up on the 19th of July. Its impossible to tell which states were conducted at which time, and how long each state took, but going strictly by the numbers, the Zogby poll is more recent than the Rasmussen one, and it gives these results:
Cantwell: 49.4%
McGavick: 41.7%
A respectable 7.5% lead, but closer than Rasmussen. But here's what really concerns me:
http://strategicvision.biz/political/washington_poll_072606.htmThis poll by Strategic Vision was conducted almost a full week after Rasmussen, wrapping up on July 23rd, and they give these numbers:
Cantwell: 48%
McGavick: 44%
If Rasmussen claims that, on July 17th, Cantwell's statewide ads were effective in enlarging the gap between her and her opponent, then how come that doesn't show up in the other two polls conducted AFTER the Rasmussen poll? Granted, Zogby's poll still shows a 7-point gap, but if you compare the trends, Zogby and Strategic Vision have McGavick narrowing the lead, while Rasmussen has Cantwell increasing the lead.
This is just a matter of different methodologies at play, so its impossible to credit one poll over another. However, when two polls agree on something and one does not, its easier to discard that one poll as an outlier. This is especially the case if that poll is the least recent of the three. I'm not trying to discount the 12-point lead that Rasmussen gives Cantwell, but its important to keep all of these polls in mind, and the times they were conducted, especially if we're trying to devine some sort of competant analysis out of them. I don't know how this race is going to turn out, I'm just saying, I have some concerns.