In a shocking finding, more than half of GOP primary voters believe President Barack Obama was not born in the United States, according to a new poll.

Fifty-one percent of 400 Republican primary voters surveyed nationwide by Public Policy Polling said they ascribe to the controversial birther conspiracy theory — despite the fact that the state of Hawaii has posted Obama’s certificate of live birth.

Only 28 percent said they think the president was born in the United States — a constitutional requirement to be president. Twenty-one percent said they were "not sure."

Among those who do not believe Obama was born in the United States, Mike Huckabee is their first choice for president, followed by Sarah Palin, Newt Gingrich and then Mitt Romney.

Those who do think the president is a citizen favor Romney over the rest of the field. Huckabee, Palin and Ron Paul trail Romney among believers in Obama’s birth in Hawaii.

A CNN/Opinion Research poll in August showed that a quarter of Americans have doubts about Obama’s citizenship, with 11 percent saying the president was definitely not born in the United States.

http://www.politico.com/news/stories/0211/49554.html