He's a member of Obama's newly-announced "senior working group" on national security:

Secretary of State Madeleine Albright
Senator David Boren, former Chairman of the Senate Select Committee on Intelligence
Secretary of State Warren Christopher
Greg Craig, former director of the State Department Office of Policy Planning
Secretary of the Navy Richard Danzig
Representative Lee Hamilton, former Chairman of the House Foreign Affairs Committee
Deputy Attorney General Eric Holder
Dr. Tony Lake, former National Security Advisor
Senator Sam Nunn, former Chairman of the Senate Armed Services Committee.
Secretary of Defense William Perry
Dr. Susan Rice, former Assistant Secretary of State

--Michael Crowley