In a sweeping interview with the Wall Street Journal, Trump explained that him calling the North Korean leader a "maniac", a "bad dude", "short and fat" and "rocket man" is part of a broader strategy to win over his enemies. Kim Jong-un's government also seems determined to achieve nuclear parity with the USA and doesn't seem interested in agreeing to a "freeze" on such weapons development as proposed by Moscow and Beijing, the analyst said.
The Vancouver meeting, aimed at increasing the US -led pressure campaign against Pyongyang, was announced by Washington just after North Korea's last intercontinental ballistic missile test in late November.
But Pyongyang - which boycotted the 1988 Summer Olympics in Seoul - agreed Tuesday to send athletes and officials to the Games as the North and South held their first formal talks in two years at Panmunjom in the Demilitarised Zone. When asked whether he has spoken directly with Kim, Trump declined to comment.
North Korean diplomats are extremely serious about the possibility of war between North Korea and the United States, noting that the USA has already prepared for it for months, a Russian expert said Wednesday.
Then U.S. President Bill Clinton expresses "regret" over the killing of South Korean citizens by U.S. soldiers during the 1950-1953 Korean War.
However, Zhao Tong, a North Korea expert at the Carnegie-Tsinghua Center in Beijing, said China's attitude might change if North Korea launched a nuclear-tipped ICBM into the Pacific Ocean or fired missiles toward Guam.
Trump claimed that his ex-chief strategist "betrayed" him when he told author Michael Wolff that his son, Donald Trump Jr., was "unpatriotic" and "treasonous" for hosting a campaign meeting attended by several Russian operatives promising "dirt" on Hillary Clinton.
The prevailing view at the State Department is that military action is not worth the huge risk, a senior US official said.
"If I were them, I would try", he said.
"It may be unsafe after the Olympics", the lawmaker said.