Ash Carter guests hosts an hour of CNBC's Squawk Box. December 13, 2018.

Former U.S. Defense Secretary Ash Carter speaks with The WorldPost’s editor in chief, Nathan Gardels, about the Trump administration’s new China policy, North Korea and the pending U.S. withdrawal from the Intermediate-Range Nuclear Forces Treaty.

To understand how I approached China during my time as Secretary, it’s important to note that I don’t see U.S. strategy in Asia as centered on China at all. I said many times: We don’t have a China policy, we have an Asia policy. The heart of that policy is a mesh of political, diplomatic, economic, and military relationships with many nations that has sustained security and underwritten an extraordinary leap in economic development.

During my time as Secretary, I referred to this structure over and over as the “principled, inclusive network.” Enunciating and reinforcing its strategic and military dimensions in a rapidly changing security environment was my constant priority as Secretary of Defense. Even amid pressing challenges such as the fight against ISIS and the need to confront Russian aggression, no other issue I dealt with had such lasting implications for our national security and prosperity.

My three-word title for this policy was admittedly not very catchy. But my counterparts in the region understood it. They understood that all three words have been essential to its success and will remain essential to its future.

From sharply rising tensions with a nuclear North Korea and decertification of the Iran nuclear deal to China’s growing global assertiveness and the State Department pullback from projecting American values, such as democracy and human rights, around the world, the United States faces urgent national security challenges.

In a panel discussion Monday evening at Harvard Kennedy School (HKS) moderated by MSNBC host Rachel Maddow, former members of President Obama’s cabinet described what they see as a fraying of alliances, a loss of credibility with allies and enemies, a stepping back as a leader on human rights and democracy, and a relinquishment of diplomacy as a critical component of national security.

A key challenge for the next administration's national security leadership concerns the management of investment in the U.S. national security future. In this paper for the Aspen Strategy Group, Dr. Ashton Carter discusses the challenges of defense budgeting and program selection, and the current mismatch between resources and strategy.

Full text of the trip report from PDP's Track II meetings in Taiwan and the People's Republic of China (PRC).

This report of the International Security Advisory Board (ISAB) offers nineteen recommendations for discouraging a cascade of nuclear weapons states.

Failure to develop a comprehensive contingency plan, such as the one proposed here, and inform the American public, where appropriate, about its particulars will only serve to amplify the devastating impact of any nuclear attack on a U.S. city

The U.S. has no choice but to adopt a two-pronged strategy towards China: one prong of engagement to encourage China to be a "responsible stakeholder" and another prong of hedging against the prospect of a downturn in relations.

Dr. Ashton B. Carter and Jennifer C. Bulkeley offer recommendations for America's strategic response to China's military modernization.