But why would a voter tell a pollster they are voting for obama or are undecided and then wind up voting against him (as opposed to any other candidate who isn't black)? I had thought that some moderate dems with some sense of guilt that they SHOULD vote Obama might be unlikely to want to tell a pollster otherwise.
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Now we're just arguing in circles. The whole point of the Bradley Effect is that people say they want the black guy so that they don't get portrayed or thought of as racists.
It goes back to my little ancedote about my Mom's feelings when Quinnipiac polling called here. My Mom thought the pollster (a black woman) seemed irritated/forceful, kept repeating questions (I guess to get a different answer), etc. Truth be told, I think my Mom was blowing it out of proportion but it got to the point where my Mom felt uncomfortable about giving the pollster certain information and was convinced that there was a bias. My Mom said that she was strongly for McCain and Palin and disliked Obama and Biden but then again my Mom is a strong, partisan (though apparently "moderate") Republican yet she still was hesitant to answer some questions. Now imagine people that aren't as set in their beliefs and think of how they'll respond in this polling.