COL (RET) JOHN MILLS, Former Director, Cybersecurity Policy, Strategy, and International Affairs, Office of the Secretary of Defense

• Col. John Mills: The President’s commitment on a CNN Town Hall to defend Taiwan should China invade was most definitely taken seriously by the Chinese - But what about the White House?

GORDON CHANG, Contributor, Gatestone Institute, Newsweek, Author, “The Coming Collapse of China,” “Nuclear Showdown: North Korea Takes the World, “Losing South Korea,” and “The Great US-China Tech War,” @Gordongchang

• Gordon Chang: We need to offer a mutual defense treaty to Taiwan and possibly nuclear arms to make sure deterrence is ensured

PATTY-JANE GELLER, Policy Analyst, Center for National Defense, The Heritage Foundation, Former Staff Assistant, Senate Armed Services Committee, @pj_geller

• Patty-Jane Geller: Our current force posture might not be enough to deter China when they start fielding more nuclear capabilities