I think that’s kinda the point: “the polls” NEVER ARE “flipped” though. Every election I can remember, where polls were a factor, the Dem has had the lead position. That is the reason I can never put much stock in what they say.
Oct 2004 CNN: Bush lead
http://www.cnn.com/ELECTION/2004/special/polls/index.html
Not saying that means much except that CNN is no obscure poll, and at this time in the 2004 election they had Bush winning--and he did.