Politico reports the White House comment that 'Birthers' aren't rational. It's linked by Drudge. I eyeballed the first 300 comments on Politico and didn't spot 1 that didn't want Obama to release his birth certificate. Politico is far from a conservative site.
As another 'Birther', Professor William Jacobson of Cornell Law School, writes at Legal Insurrection:
No one really knows who Obama is, because almost everything we know about Obama prior to his entering public life comes from Obama alone.


