"This should have been solved by many others", Trump said.
He added the USA could "absolutely" sign an agreement to end the Korean War, tough the bloodshed stopped with a 1953 armistice, and that, eventually, "we would certainly like to see normalization" with Pyongyang.
After weeks of tensions, Trump tweeted that he "tries so hard to be his friend". "And things can happen between now and then".
The objective of Trump's "maximum pressure campaign" is to press North Korea to return to dialogue and produce desirable outcomes from talks.
Still he predicted he'll know very quickly whether Kim is serious about dealing with US demands.
Abe also wants to ensure Trump takes Kim to task over Japanese citizens abducted by North Korea in the 1970s and 1980s.
In the meantime, however, the "maximum-pressure campaign" will continue - though Trump said he was reluctant to use the term in light of the pending summit.
"We shall never repeat the past mistakes", Mr Abe said. The sanctions are extraordinarily powerful.
SpaceX to launch SES-12 communications satellite
Falcon 9's first stage for the SES-12 mission previously supported the OTV-5 mission from Launch Complex 39A in September 2017. SES-12, the 13th satellite built by Airbus for SES , has been successfully launched from Cape Canaveral, Florida on 04 June.
Seeking French support, Netanyahu raises alarm over Iran enrichment plan
Late last month, the supreme leader outlined Iran's demands for it to stay in the nuclear deal. Kamalvandi has said Iran is preparing to expand its uranium enrichment capacity.
Two decades later, Clinton gets tripped up in a #metoo rehash
Clinton also said that he paid dearly for the scandal , stating he faced millions in debt after he left the White House . The House Republicans' move against Mr Clinton in 1998 made him only the second U.S. president to have been impeached.
Describing a letter he received from Kim last week Mr Trump said: "It was a warm letter and nice".
But he said he had many sanctions he could use against North Korea, but didn't intend to "because I really think there's a potential to make a deal".
"I will provide an update and underscore the importance of implementing all sanctions imposed on North Korea", Pompeo told reporters at the White House.
A Hong Kong-based entertainer who impersonates the North Korean leader said he was detained at Changi Airport after returning to Singapore ahead of the historic summit planned for Tuesday.
Trump has made clear he prefers a bilateral deal to reduce the USA trade deficit with Japan, while Abe's government says multilateral agreements would be best.
"I think it's going to be a very fruitful meeting". Trump hosted Abe twice at his private Mar-a-Lago estate in Palm Beach, Florida.
Trump and Abe so far seem to have forged a sort of friendship, but even that bonhomie was revealed to be limited at their last meeting. "But I think I've been preparing for the summit for a long time", Trump told reporters in a brief joint media appearance with visiting Japanese Prime Minister Shinzo Abe in the Oval Office. "It's about attitude. It's about willingness to get things done", he said.
"We're going to be fine, with respect to Iran", Trump said.
Both Abe and Trump head to Quebec for the G-7 summit on Friday and Saturday.