"With all of the failed "experts" weighing in, does anybody really believe that talks and dialogue would be going on between North and South Korea right now if I wasn't firm, strong and willing to commit our total "might" against the North", Trump tweeted.
Fast-thawing relations between North and South Korea have renewed enthusiasm for the 2018 Pyeongchang Winter Olympics, but North Korea may be using the momentum to request other concessions from Seoul. He hoped that that the first North-South Korea talks since 2015 might lead to success for the world.
But U.S. Secretary of State Rex Tillerson, who will co-host the Vancouver meeting with Canadian Foreign Minister Chrystia Freeland, has been pushing for the interception of North Korean vessels.
Meanwhile, the state-run Korean Central News Agency reported Friday that Kim, while inspecting the State Academy of Sciences, declared "there are no difficulties insurmountable for us despite the enemies' sanctions of 10 years or 100 years".
The US and North Korea have been estranged diplomatically for nearly a decade, and in November Mr Trump's administration categorised the country as a state sponsor of terror.
"We need to have a deep consideration regarding how we would appropriately manage these tensions, prevent unintentional clashes and establish dialogue with North Korea", Moon added.
North Korean leader Kim Jong-un waves to his loyal men as he visits the national science centre in
"And you see in North Korea what's happening with North Korea all of a sudden".
The war of words led some to conclude that the at-times-heated rhetoric was in danger of spiralling out of control - but during a cryptic interview with the Wall Street Journal conducted in the Oval Office, Mr Trump at least seems unconcerned. However, the North's traditional allies, both China and Russian Federation, have been put on the back foot in global platforms over Pyongyang's increasing belligerent stance on its nuclear and missile programmes.
Among the issues to be sorted out is the number of athletes and officials from North Korea who will attend the Olympics from February 9-25, which is complicated by the fact that the deadlines for registration have already passed.
"I have relationships with people", Trump continued. Trump told reporters as he met members of his Cabinet at the White House.