Not that I am unhappy with the results shown by that poll, but it is of interest to read any third-party pollster's methods of data collection. Of particular interest in THIS poll, they do not poll Hawaii or Alaska at all, and of course, they only poll people with telephones. They do NOT say whether they poll people with only land-line phones, but that IS the case quite often. (Considering the movement of people, especially young people, to using only cell phones, like Cricket-type services, this can be a significant thing.)
In other polls, Gallup, for instance, only "likely voters'" results are included. A likely voter according to Gallup is one who is currently registered and has voted in the last 2 federal elections. And, they "weigh" the answers of people from different party affiliations differently, but the process is not particularly well-explained.
I think the only realistic poll of politics is an actual exit poll, performed at polling sites and of persons who have just voted.
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Goodbye Ruth & Betty, my beautiful grandmothers.
Betty Kuzara 1921 - April 5, 2008
Ruth Kellison 1925 - Dec 27, 2007