China and the U.S. have cooperated well on the North Korean nuclear issue. But recent U.S. actions puts this cooperation at risk.

China and South Korea agreed to normalize bilateral relations at the end of last month, officially ending the THAAD dispute. While Beijing’s economic coercion based on nationalism in the THAAD standoff seems worrying from the standpoint of a foreign observer, this is an isolated event and is unlikely to be repeated often.

The objections to THAAD are misguided. The more antiballistic missile systems the world has, the safer it will be.

The Taiwan Travel Act will harm both China’s relations with the US and with Taiwan. It may also forfeit the possibility of peaceful reunification.

After five months of intense firefights between government troops and Islamic State (IS)-affiliated militants, the Battle of Marawi is now effectively over. Yet, the specter of terror in Mindanao is far from over. The Philippines may have managed to contain, at least for the meantime, the prospect of an IS stronghold in its backyard, but religiously inspired extremism and violence will continue to haunt Mindanao for the foreseeable future.

Trump's approach on Iran will create uncertainty and open new rifts in trans-Atlantic relations.

Trump’s new strategy might have little legal effect on the Iran nuclear deal, but it will undermine it politically, and exacerbate many regional problems.

In terms of promoting cooperation on other issues, cybersecurity cooperation is now playing the role that climate change did during the Obama administration.

Trump has failed to learn from the success of the Iran nuclear deal and to apply those lessons to North Korea. His failure risks the future of nonproliferation.

In the South China Sea, Russia and China do not have, and nor do they seek, a formal alliance. Instead they have agreed to cooperate and coordinate on international issues over which their interests converge. On issues where their interests diverge—and especially those pertaining to each other’s core interests—they have agreed not to oppose each other.