Sen. Richard Lugar, R-Ind.; Rep. John Murtha, D-Pa.

Gen. Peter Pace, chairman of the Joint Chiefs of Staff; former Sen. John Edwards, D-N.C. and former Rep. Jack Kemp, R-N.Y., co-chairmen of the Council on Foreign Relations’ task force on U.S. policy toward Russia.

Gen. James Jones, NATO supreme allied commander; Iraqi Parliament member Adnan Pachachi.

Pace; Michael Brown, former head of the Federal Emergency Management Agency; National Weather Service Director David Johnson.

Sen. Susan Collins, R-Maine; Rep. Duncan Hunter, R-Calif.; retired Gen. Wesley Clark; comedian Stephen Colbert.