But the author is correct to identify the Realists relation ship with Obama because Obama campaigned on Realist foreign policies against McCain who campaigned on NeoCon foreign policies.
And thru-out 09 and 10, Obama has faithfully followed the Realists. It has only been in 2011 that Obama has drifted towards Liberal Interventionist policies.
Many GOPers and freepers mistakingly take great glee when the NeoCons criticize Obama's forign policies but they ought to be listening to complaints from Kissinger, Brzezenski, Scowcroft, and other prominent Realists.
The reality is that Obama, like all dem presidents, has a foreign policy team composed of Realists and Liberal Interventionists. And as is most often the case, Obama has a Liberal Interventionist as Sec of State(Hillary), a Realist as NSA(first Gen Jones replaced by Donolon), and a Realist as SecDef(Republican Realist Gates who will be replaced by Dem Realist Panetta).
Under constant pressure from the Democrats for a "timeline" and an "exit strategy" while things were progressing but were still too unstable to determine such properly.
I blame Bush for caving in to the Dems on that, but the Dems are far from being blameless in this themselves.
I can't parse the stripes the way you do, but this is realism to me. Not that it has to be a US presence in Iraq, but a viable counter-weight to Iran is essential, which Saddam's increasingly decrepit military obviously no longer was. Scowcroft, Odom and the rest of them are the Ramsay Clarks, Daniel Elsbergs and Philip Berrigans of their generation to me-- they probably would take that as a compliment.