Meanwhile, a USA aircraft carrier and supporting warships arrived on the Korean peninsula and began exercises with the South Korean navy late on Saturday.
Trump on Sunday repeated his determination to resolve the threat posed by North Korea, warning in a CBS interview: "We can not let what's been going on for a long period of years continue".
Trump did not say what conditions would need to be met for any such meeting to occur or when it could happen, but the White House later said North Korea would need to meet many conditions before a meeting could be contemplated. "President, please see to it that there is no war because my region will suffer immensely.'" He added, "I will just communicate to (Trump), 'just let him play ... do not play into his hands'".
Despite such efforts, two inter-related developments have taken place that, if not effectively controlled, could undo global co-operation in reducing stockpiles and even contribute to increasing tension between some states already possessing nuclear weapons. Leading candidates have promised a new era of relations with Pyongyang.
"Look, because if you hurt your knee, honestly, I'd rather have the federal government focused on North Korea, focused on other things, than your knee, okay?"
Trump has stated repeatedly that all options are on the table regarding Pyongyang, and that conceivably would include diplomacy. The vote also has become a referendum on USA relations - about how close South Koreans want to be with the United States. It has been conducting such tests at an unprecedented rate and is believed to have made progress in developing intermediate-range and submarine-launched missiles. That would put US ally South Korea in immediate danger, he said on CNN's "State of the Union". "But that doesn't mean we can not do things to constrain them like we did with the Soviet Union during the Cold War, and Iran now".
When outgoing USA president Barack Obama briefed his replacement, Donald Trump, he stressed that the most serious foreign-policy challenge confronting the United States was the threat posed by North Korea's development of nuclear missiles capable of reaching the US mainland. Her backers tend to be older, Christian, conservative and pro-U.S. - people who lived through the 1950-'53 Korean War as children. "And at a very young age, he was able to assume power", Trump said on CBS's "Face the Nation". "Who am I to say that you should stop?" Choi asks. "I can not understand what he is doing now".
CIA Director Mike Pompeo answers questions at the Center for Strategic and International Studies (CSIS) in Washington, April 13, 2017.
Meanwhile, the President who vowed to "make America safe again" - now on a whirlwind interview circuit capping off his first 100 days in office - claimed "nobody's safe" from the threat of North Korea amid ratcheted-up tensions.