"Just asking!" Trump tweeted.
Moon and Kim agreed to work on a plan to formally end the Korean War that has essentially been on hold since 1953.
Last week the leaders of North and South Korea met and pledged to end hostilities and work toward the "complete denuclearisation" of the Korean peninsula, seeming to increase the likelihood of the Trump-Kim summit. Rodman reportedly gave Kim "The Art of the Deal" during a visit in 2017.
Friday's extraordinary meeting, heavy on the symbolism of renewed friendship but short on fresh policy decisions, prompted a mixed response from US officials over the weekend. Indeed, Trump captured the votes of disfranchised people, but unlike Obama, he is tearing apart the country by blaming problems in minorities, judiciary, allies and general decency in general.
But the leader of the main opposition Liberty Korea Party, Hong Joon-pyo, told reporters that the summit made no progress on the most fundamental issue of scrapping North Korea's nuclear program.
The Trump administration has led a global effort to impose ever stricter sanctions on North Korea.
Kim said he found it a "painful wrench" to see two wall clocks hanging at the summit venue showing different times for the two neighbours, KCNA reported. And for a complete peace to arrive South and North Korea will collaborate closely.
"That's very nice, thank you", Trump replied.
The creation of "Pyongyang time" drew criticism from Moon's conservative predecessor Park Geun-hye for further deepening the disparity between the two Koreas, whose division was sealed by the 1950-53 Korean War. Kim has never defined what denuclearization means.
"The camaraderie of all of my friends and buddies". The impact is really, there is less stress now in the Korean Peninsula. Again, the question here is: unification on what terms?
Jo Myong Rok, a senior North Korean military leader returned the favor a few years later, visiting Washington to meet President Clinton in 2000.
Trump is preparing for his own summit with Kim, which he said would take place in the next three to four weeks. "We're going to look for actions and deeds". This indicates Harris' words are prescient.
"And I don't want to take all the credit".
A lot of heads are still spinning as Kim continues his attempted transformation from dictator to diplomat.
The village of Panmunjom sits on the 38th parallel, a line drawn by the former Soviet Union and the US after World War II to separate the countries. And there will be practical steps to connect and modernize railways and roads, building on a 2007 agreement.