At least that is the finding of Public Policy Polling.
Palin rates highly amongst the birfers
However, most Republicans think Palin isn't qualified to be President.
Public Policy Polling: Romney and the Birthers
However, the poll is relatively small, and PPP didn't release much on the composition of the sample, which in fairness, may skew the results.
http://www.publicpolicypolling.com/pdf/PPP_Release_US_0215.pdf
Birthers make a majority among those voters who say they're likely to participate in a Republican primary next year. 51% say they don't think Barack Obama was born in the United States to just 28% who firmly believe that he was and 21% who are unsure. The GOP birther majority is a new development. The last time PPP tested this question nationally, in August of 2009, only 44% of Republicans said they thought Obama was born outside the country while 36% said that he definitely was born in the United States. If anything birtherism is on the rise.
Palin rates highly amongst the birfers
There is really a remarkable divide in how the birther and non-birther wings of the GOP view Sarah Palin. With the birthers she is a beloved figure, scoring an 83/12 favorability rating. Non-birthers are almost evenly divided on her with 47% rating her positively and 40% unfavorably.
However, most Republicans think Palin isn't qualified to be President.
This is yet another poll where we find Palin with the highest favorability among Republican primary voters but still lagging in the horse race. 65% have a positive opinion of her compared to 58% for Huckabee and 55% for Romney and Gingrich. Her problem is that even though they like her, few GOP voters think Palin's qualified to be President. Asked whether she's more qualified to be President or Vice President, only 29% of voters place her in the top spot compared to 46% who say she'd be a more appropriate number 2.
Public Policy Polling: Romney and the Birthers
However, the poll is relatively small, and PPP didn't release much on the composition of the sample, which in fairness, may skew the results.
PPP surveyed 400 Republican primary voters nationwide from February 11th to 13th. The surveys margin of error is +/-4.9%. Other factors, such as refusal to be interviewed and weighting, may introduce additional error that is more difficult to quantify.
http://www.publicpolicypolling.com/pdf/PPP_Release_US_0215.pdf