Polls are NOT predictions. The only time a poll is a prediction is when it is done immediately before the election, say the weekend before. Otherwise, all they mean is that IF the election were held that day, which it is NOT, this would be the likely result. That is why all these polls being taken now about the election in November are meaningless except for showing the folks that there is a lot work that needs to be done and these are the issues that seem to be important and that can be used to our advantage. That is all you need to know about polling. Now shut up.
If you remember 2004, Kerry peaked too soon and was going down when election day finally arrived. Similar thing happened in the off year elections of 2006.