You conduct a hundred polls which show 'X', and all it shows is how certain questions were answered by a few folks.

In this case, all it might mean is that a 'majority' of Republicans think that any doubts about Obama are worth cultivating. You can't tell how many really 'believe' the birther line... or even what they use as 'evidence'. Many have never gone beyond that batch of made up and...literally.... faked 'data' by that woman dentist...Orly Taitz. A brief review of HER history should cause one to wonder how ANY poll of devout Republicans on this matter could generate good statistics.