From NBC's Mark Murray
If this isn't the most striking example of the sharp divide between the Republican base and South versus the rest of the country, I don't know what is.
Video: Rachel Maddow wraps up the Birther conspiracy.
According to a Research 2000/DailyKos poll, eight in 10 Americans believe President Obama was born in the United States. But among Republicans, 28% of them say he WASN'T born in the country and another 30% say they're not sure. (By comparison, 93% of Democrats and 83% of independents say Obama was born in the U.S.A.)
Also, 23% of Southerners don't believe he was born here, and an extra 30% aren't sure. (On the other hand, 93% of those living in the Northeast, 90% from the Midwest, and 87% from the West believe he was born in this country.)