In fact, while the Americans’ outreach was underway, the exchange of public threats between the two countries accelerated. They have included declarations that the North might conduct an atmospheric nuclear test and that it had the right to shoot down American warplanes in international waters.
“We can talk to them,” Mr Tillerson said at the end of a long day of engaging China’s leadership. “We do talk to them.” When asked whether those channels ran through China, he shook his head.
“Directly,” he said. “We have our own channels.”
During the 2016 presidential campaign, Mr Trump said that, if elected, he would sit down and negotiate directly with Mr Kim, perhaps over a hamburger. He seemed confident that his deal-making skills could extend to nuclear disarmament, but at times talked about getting other powers — chiefly China and Iran — to deal with North Korea for him, because they would have more leverage.