“All of these North Korean experts in Washington — if they are so expert on the North Korean issue, we would have never been dealing with this today,” Mr. Yu said Thursday from his table at a busy Golden Corral cafeteria. “We should have been dealing with this 10 years ago. They’re still saying, ‘We’ve got to have six-party talks, we’ve got to give this, we’ve got to have that.’ We’ve had enough.”…

“I believe that this idiot over there is trying to make a name for himself,” said Mr. Yu’s friend Ralph Barbee Jr., 76, a Vietnam veteran and former host of a local fishing show who arrived at the Golden Corral in an S.U.V. adorned with stars, stripes and an enormous photo of Mr. Trump on the hood. “I believe if he fires one more missile, that’s the end for them.”…

Though a number of conservatives welcomed Mr. Trump’s language, seeing it as a break from decades of more subtle — and what they argued were failed — negotiating strategies pursued by both Democratic and Republican administrations, Mr. Obama’s efforts came in for special criticism.