These are the topline results of a YouGov/Huffington Post survey of 1000 US adults interviewed September 17-19, 2016 on birthers. The margin of error is 4.7%.
Click here to see full tables and demographic crossbreaks
Do you think Barack Obama was born in the United States, or not?
Half of respondents were informed that Donald Trump had said ’President Obama was born in the United States, period.’
Yes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61%
No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22%
Don’t know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17%
Donald Trump recently said that he believes "President Obama was born in the United States, period." Do you think Barack Obama was born in the United States, or not?
Asked of half of respondents
Yes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63%
No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20%
Don’t know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18%
Do you think Barack Obama was born in the United States, or not?
Asked of half of respondents
Yes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59%
No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25%
Don’t know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16%
Which best describes your opinion?
There was never any reason to doubt that Barack Obama was born in the United States . . . . . . . . . . . . . . . . . . . . . .49%
There were reasons to doubt that Barack Obama was born in the United States, but those questions have now been settled . . . . . . . . . 13%
There are still reasons to doubt that Barack Obama was born in the United States . . . . . . . . . . . . . . . . . . . . . . . . . . . .27%
Not sure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12%
After years of questioning where President Obama was born, Donald Trump recently said that he believes President Obama was born in the U.S. Do you think:
Donald Trump never really believed that Barack Obama wasn’t born in the U.S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29%
Donald Trump used to believe Barack Obama wasn’t born in the U.S., but he’s changed his mind . . . . . . . . . . . . . . . . . . . .19%
Donald Trump still really believes that Barack Obama wasn’t born in the U.S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27%
Not sure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25%
Do you think Donald Trump should apologize to President Obama for having questioned whether he was born in the U.S.?
He should apologize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51%
He should not apologize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38%
Not sure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11%