Still waiting for AP to Find Out that Bill Ayers Wrote Obama's Books

AP has 11 reporters combing Palin's autobiography  (helping each other read it). 

So far AP has  neglected to do any fact finding on Obama, his birth, his academic  transcripts, his job experience and resume, his medical records,  his associations with criminals and terrorists, and the details of his claim to citizenship.

Is the difference in scrutiny due to sex, race or political ideology, or a combination of the three?