Jim Webb's been one of the most outspoken members of Congress about the warmongering efforts of the Bush/Cheney administration to attack Iran. 29 others signed his letter that's addressed to President Bush. Here's the pdf to see the original.
Along with 29 co-signers, Senator Jim Webb of Virginia sent a letter to the White House today warning the President not to take offensive military action against Iran without the express consent of Congress. Designed to clarify any ambiguity as a result of a recent Senate amendment urging designation of the Iranian Revolutionary Guard as a terrorist organization, the Senators also expressed concern that the administration’s increasingly provocative rhetoric has undermined diplomatic efforts with Iran.
He's leading on this and I'm thrilled. Biden and Obama finally jump in and respond on this. I really don't see this as a rift. The more people that start talking about this the better. Obama is now coming out with his own legislation.
I don't care what any campaign says about "political motives" as long as they all line up against an attack on Iran---then I'm behind it.