The Biden administration is eager to meet with North Korean officials “anywhere, anytime without preconditions,” a top U.S. diplomat said on a visit to South Korea Monday, days after North Korean leader Kim Jong-un signaled that his regime is preparing for dialogue or confrontation — but more for confrontation — with Washington. Ambassador Sung Kim, whom President Biden tapped last month to serve as U.S. special envoy for North Korea, made the comments during a meeting with his South Korean and Japanese counterparts in Seoul, asserting that administration officials “hope [North Korea] will respond positively to our outreach.” At the...