Or perhaps birthers are the only ones willing to give WingNut Daily their email addresses required to participate in the poll.
Now..., now..., I do like WingNut Daily, uummm..., I mean WorldNetDaily.... but you're right, polls on the Internet are self-selecting and knowing how the Obama Derangement Syndrome crowd is here, I know they would walk through fire and burning lava, for this issue -- so giving an e-mail address is nothing... LOL...
Respectfully, I'm sorry but WND started out as a reputable conservative news outlet. Over time, sadly, they've morphed into some right-wing version of Weekly World News minus their own Batboy and relying on the "we read it somewhere on the internet" method of reporting.
It's a shame, really, IMHO.