Poll stunner: Birthers are half of GOP primary voters (That's about how man REPUBS I think are nuts - I have stats to back me up Thanks!)

• 51 percent of likely primary voters nationwide think President Obama wasn’t born in the United States

• 28 percent think he was born here, 21 percent aren't sure

• Among those who don’t think he was born in U.S., Sarah Palin has 83 percent favorability ratings

• Mike Huckabee follows with 64 percent favorability among birthers

• But Huck wins a birther primary with 24 percent of the vote (Palin 19 percent, Gingrich 14 percent)

• A slightly greater proportion of women are birthers (53 percent)

• A higher proportion of voters 18 to 29 and older than 65 are birthers

Public Policy Polling survey of 400 voters. Margin of error 4.9 percent