The first summit between South Korean President Lee Jae-myung and U.S. President Donald Trump managed to defy the worst expectations for how a volatile American leader could impact North Korea policy and alliance relations.

That appears to have been due in large part to the mix of political advisers and experienced diplomats whom Lee brought with him to Washington, combining personal, pragmatic and public diplomacy to avoid the kind of clash that has derailed Trump’s meetings with other world leaders in his second term.

With the possibility of U.S.-North Korea engagement