A significant Pew Research Center poll, Beyond Red vs. Blue: The Political Typology, was released May 4 (the survey was taken prior to Obama’s release of his long-form birth certificate). The poll was wide-ranging, and includes a section on attitudes about Barack Obama, and even a question on where he was born. Here we can see some specifics about the political identification of people who mistakenly think Obama was born outside the US. The link preceding goes directly into the relevant section for this blog, but the entire poll is quite interesting.
Detailed result tables. I thought the section on media habits was illuminating (p. 3).