Every statement I've read so far, he reiterates that nobody from the Bush family asked him for assistance.
Barnes is an idiot and a scumbag and an opportunist, but he (as far as I know) has never claimed that a member of the Bush family asked him to do anything.
I don't get the point of this entire thread.
Perjury is not about just DIRECT false statements, unknown to most people who don't deal with the law, perjury ALSO INCLUDES STATEMENTS THAT ARE DESIGNED TO DECEIVE OR MISLEAD. THAT ALSO INCLUDES STATEMENTS THAT ARE EVASIVE WHEN YOU'RE UNDER OATH.
If the context of the question was one related to helping out Bush, and he's singing a different tune now, then the statement is perjured.