dispute the news. 42% say that president obama was definitely not born in the u.s., and another 16% saying he probably wasn't. does that mean na a significant new core group of americans believes he is not eligible to be president? cnn polling director keating holland does not think so, because he says that those who believe that president obama was not born in america are not committed. >> they are probably not obama fans and conceivable that they might vote for obama or other democrats as well. >> but he says that those on the fence are listening to right wing commentators like rush limbaugh who fuelled the fire this week on his radio show. >> they tell us that august 4th is the birtdday, but we haven't seen birth of it. >> reporter: and i asked, what about if those tepid doubters stay steeped in the belief of his birth? what does it mean for him in 30,000 feet? >> well, the re-election bid is