I know it's designed as a hit piece against McCain, but Fred Kaplan's Slate article sounds remarkably reassuring in spite of its author's intentions:

Many foreign-policy mavens have wondered which John McCain would step to the fore once he started running for president in earnest—the McCain who consorts with such pragmatists as Richard Armitage, Colin Powell, and George Shultz; or the McCain who huddles with "neocons" like Robert Kagan, John Bolton, and William Kristol (before he started writing op-eds for the New York Times).

Last month, the Times published a story about the battle for McCain's soul that's being waged by those two factions.

On Tuesday, McCain cleared up the mystery: He's with the neocons. He is, fundamentally, in sync with the foreign policy pursued by George W. Bush for his first six years in office.

I have no doubt that Obama’s staff will rush forward to declare, as they have before, that Brzezinski is only a informal adviser. But the question remains why Obama has had a retinue of advisors (both formal and not) like Brzezinski, McPeak, and Malley who hold views so antithetical to Obama’s supposedly unassailable record and views on Israel. You can understand how rational voters, Jewish or not, would conclude that something is amiss and wonder why Obama does not disassociate himself entirely from these people. But no, those Jews are just hung up on Obama’s name and the phony emails about Obama’s Muslim upbringing. That must be it.

Incidentally, Rubin, along with Tammy Bruce, Ed Morrissey, and Steve Schmidt, a senior McCain campaign adviser, were the guests this week on PJM Political. If you missed it on XM's POTUS '08 channel today, tune in here.