North Korea seeks to exploit major-power rivalries and weaken U.S.-South Korea ties with its ramped-up missile testing. Already, it has ratcheted up nuclear tensions on the Korean Peninsula to their …

Denuclearization talks over the weekend ended in another stalemate, and it remains to be seen if negotiations will resume in the coming weeks.

The United States and South Korea should pursue an expanded nuclear agreement that supports the production of civilian nuclear power and enhances extended deterrence against the North Korean threat. …