The current tensions over Pyongyang’s nuclear and missile programs have become a U.S.-North Korea bilateral story, as the two countries’ leaders spar in public. In addition, coordinating with the South Korean government is tricky when the political philosophies in Washington and Seoul diverge. Comparing this current crisis to regional stresses in Europe over Russia and in the Arab world over Iran shows how the immediate neighbors of an adversarial state often have different interests than Washington. And even when threat perceptions converge, policy preferences may not.

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