SARAH PALIN has defended her attack on Democratic presidential nominee Barack Obama after accusing him of "palling around with terrorists".

The Republican vice presidential nominee said it was legitimate to raise Mr Obama's association with 1960s radical Bill Ayers.

She said: "The comments are about an association that has been known but hasn't been talked about."

She repeated the claim at separate campaign stops on Saturday, adding that Mr Obama "is not a man who sees America as you see America and as I see America".

Mrs Palin's comments highlighted Mr Obama's association with Mr Ayers, a founder of the Weather Underground.

Its members took credit for bombings, including attacks on the Pentagon and the US Capitol, during the Vietnam War. Mr Obama and Mr Ayers live in the same Chicago district and served on a charity board together.