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I guess a larger sample size would also make for a better poll, but I don't know much about which ones are most reliable. I usually use the rcp average, but those can be misleading as well in these states that haven't been polled more than once or twice recently and go back all the way to December. The rcp average for Tennessee taking all of those 3 polls into account is Clinton 48.0, Obama 30.7, so I guess that's a little more accurate then just going by one poll but in some of these states there is only one recent poll. I see your point though, as Massachussetts has Clinton ahead by only 6 points in the 28th, and ahead by 24 points on the 30th.
Does anyone know if polls done by local newspapers, colleges, and tv stations are generally better than national pollsters like rasmussen's and survey USA?
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