If it did happen it could be a good thing, I can tell you, for North Korea, but it could also be good for a lot of other places and be good for the rest the world.
Last month North Korea made threats to reduce the USA to "ashes and darkness" in response to sanctions imposed by the UN.
A particularly stern speech from Mr Trump in South Korea prompted Kim's government to brand him an "old lunatic" - the latest broadside in a long-running war of words between the two leaders.
Visiting Asia, the president has tried to bring the world together in pressurising North Korea's nuclear weapons programme, something that's proving somewhat of a tough task.
While in Vietnam, US President Donald Trump said that he would not rule out the possibility of a future friendship between himself and North Korean leader Kim Jong-un.
Kim's regime has continued to carry out nuclear and ballistic missile tests despite widespread global condemnation and a series of crippling sanctions aimed at strangling the state's cash sources.
U.S. President Donald Trump on Sunday tweeted a derisive message on North Korean leader Kim Jong-un in response to Pyongyang's repeated insults against him.
He said it would be a "good thing" for North Korea and the world if he and Kim could become friends, saying it "might be a unusual thing to happen but it's certainly a possibility".
During his trip to Asia, Trump asked China in particular to cut off oil and other economic assistance to its ally North Korea, a request he also referenced on Twitter. "I don't know that it will, but it would be very, very nice if it did".
Mr Trump will travel to Manila later on Sunday for the final stop on his Asia tour, before flying back to the US.
The US is not a claimant to the potentially oil-rich and busy waters, but it has declared that it has a national interest in ensuring freedom of navigation and overflight and the peaceful resolution of the dispute.
Jouas, formerly deputy commander of US Forces Korea, said the near 30,000-strong US forces stationed in the neighboring South would struggle to counter the North Korean Army, which the country claims nearly 5 million people have volunteered for.
Mr Trump declined to say whether he believed Mr Putin, but he made clear he wasn't interested in dwelling on the issue.
Mr Duterte took steps to thaw frosty relations with China after he won the presidency past year.
"We have repeatedly said that we do not hold the hostile policy, we don't seek to change regime, we don't seek to march beyond the DMZ", she said.