I told Rex Tillerson, our wonderful Secretary of State, that he is wasting his time trying to negotiate with Little Rocket Man...
Tillerson had on Saturday raised hopes for a possible dialogue with the reclusive regime, speaking of direct lines of communication with North Korea in a bid to "calm things down" after months of escalating rhetoric over Pyongyang's reckless nuclear and missile push.
Mr Tillerson is a chief architect of the administration's "peaceful pressure campaign", an initiative that seeks to use UN Security Council sanctions to try and choke North Korea's economy while pressing countries to stop accepting North Korean guest workers and close the regime's diplomatic outposts.
In August, he said the USA military was "locked and loaded" ready to deal with North Korea, just hours after his defence secretary tried to cool tensions by saying that diplomatic efforts were succeeding.
Great expectations: US Secretary of State Rex Tillerson and China's President Xi Jinping meet the press.
He reiterated that Washington would not recognize North Korea as a nuclear power but also has no plans for regime change. At the same time, increased sanctions and diplomatic pressure have done little to force North Korea to alter course.
After he left China, his spokeswoman issued a statement saying that North Korean officials "have shown no indication that they are interested in or are ready for talks regarding denuclearization".
U.S. -North Korean communications are long-standing.
But Richard Haass, a former senior State Department official and now president of the Council on Foreign Relations, criticised Trump's stance, tweeting: "Diplomacy not a favour we dispense but a critical national security tool for ourselves".
Millions of young men and 1.22 million women said they wanted sign up to counter the us since Friday, the Rodong Sinmun newspaper reported.
Malaysia banned its citizens from traveling to North Korea until further notice on Thursday, citing Pyongyang's recent missile tests. Others said the tweets might represent a "good cop-bad cop approach" to North Korea that may or may not be misguided or bear fruit.
Still, Mr Tillerson said the most important thing is to ease the rhetoric.
North Korea responded to the insult at the United Nations in kind, with Kim saying, "I will surely and definitely tame the mentally deranged U.S. dotard with fire". But he insisted that it was up to the North to halt missile launches.