I think the Bradley or Wilder effect is definitely in play here. There are probably many voters that for one reason or another be it race, prejudice, etc. etc. they simply will not vote for a Barak Obama and they have successfully eluded polling efforts.
The only thing that has polled so far is that somewhere between 75% and 85% of the Dems are actually supporting Obama for potus. Statisticstas I have seen suggest without at least 90 % they lose every time. Either way we shall see soon.
In this election the Bradley effect takes the form of people who won't vote for Obama because of his policies but either won't talk to polsters or lie about who they are voting for out of a justified fear of being called a racist if they dare not vote for the big O.
The only thing that has polled so far is that somewhere between 75% and 85% of the Dems are actually supporting Obama for potus. Statisticstas I have seen suggest without at least 90 % they lose every time. Either way we shall see soon.
I think the biggest shock to come out of this election will be the large number of Democrats who end up not voting for Obama. I also think other groups that the Dims and the DBM assume are on board but aren't, such as women and Hispanics.