On Friday, welcoming the meeting between North Korean leader Kim Jong Un and the South's president, Mr Jean, he said Washington will not retreat without Pyongyang's specific announcement to stop nuclear disarmament.
In preparation for the trump-Kim meeting at the end of May or the beginning of June in the continuation of the two Korean summit, the US President credited the administration's actions in the field of dramatic changes in the Korean peninsula situation, Reuters said.
"We will not repeat the previous administration's mistakes. The highest pressure will continue until the nuclear free situation is achieved, "he said at the press conference after meeting German Chancellor Angela Merkel in Washington.
He also hoped that his meeting with North Korean President Trump will be fruitful by Kim commenting that Kim will cancel the program of nuclear missile.
The previous US administration has piengyang 'resembled a violin' as his work was recovered, alleging that he
Observers say there is no guarantee that Pyongyang would stop its nuclear arsenal, after the two Korean summits ended with a smile, shaking and a 'future of prosperity and peace'.
North Korean leader Kim Jong-un and South Korean President Mon Je-in announced that the Peace House in Panmoonzam on Friday will work together to free the Korean Peninsula from nuclear weapons.
At the same time, the commitment to work with the United States and China to sign a peace treaty with the closing of the arms clash this year has come from two leaders.
In the announcement, the two Koreas promised to stop attacking or stop military activities, to make the 'demilitarized zone' of the border peacefully, to reconstruct the families of isolated warriors, and to increase road and railway communication system along the border and jointly participate in different sporting events.
China praised both the leaders' courage and political determination of the leaders. In a statement from the Foreign Ministry of China, it said that they hope that this trend of progress will continue, as they expect it to continue.
US President Donald Trump welcomes the initiative of the two leaders in an instant tweet.
Some analysts believe that North Korea is probably using this conference to increase its image in international scale, disrupted by the economic sanctions of international organizations including the US and the United Nations.
Kim was the first North Korean top leader after the Korean War, who crossed the military line and went south. In recent months Pyongyang's 'apparently positive' action has also caught the attention of international media, despite the worries of the world by launching one missile and nuclear after the last few years.
Earlier, in a number of meetings in Korea, North Korea pledged to withdraw from its nuclear program, although the condition was that the 'nuclear umbrella' of the peninsula, supported by the US military bases in South Korea and the backing of Seoul, has been removed.
Nearly 28,500 soldiers of the US are deployed in South Korean bases.
On Friday, US Defense Minister Mattis said his country would work to increase confidence with North Korea. Although he did not answer what would happen if the US forces were to move from South Korea to a future peace deal.
US intelligence officials say they are overwhelmed by Kim's behavior, but they are not forgetting North Korean threats with nuclear weapons. If Kim does not make a specific announcement in non-nuclear, then Washington will see Pyongyang in the eye of his eyes.
US Vice President Mike Pens also said in a statement that the United States will "verify" any North Korean commitment.
New Foreign Minister Mike Poppe also says that Kim is optimistic about the agreement he wants to reach.
Instead of Tyleron, former director of the CIA Triangle nominated the top diplomat to his administration, after visiting a tour of Pyongyang on a secret visit, Pompeo met Kim.
"I believe that, as the whole world, under the leadership of Trump, has put economic pressure on his (Kim), he believes that it will be better if he talks about non-nuclear saturation at the discussion table," at a press conference after the NATO ministerial meeting, Foreign Minister.