In May, Trump cancelled summit talks with North Korea.
In August, Trump cancelled high-level peace talks with North Korea.
By fighting against peace on the Korean peninsula, Trump is carrying out a 70-year long American tradition.

The problem for Washington is that South Korea has a new president, thanks to the Candlelight Revolution, and he's pushing for peace in defiance of what the warmongers in Washington want.

North Korean leader Kim Jong Un and South Korean President Moon Jae-in recently had a 3rd Summit, that the Trump Administration refused to attend. Because the U.S. wasn't there, important progress was made.

After the conclusion of the summit’s second meeting on Sept. 19 at the Paekhwawon Guest House in Pyongyang, the two leaders appeared determined as they jointly announced the September Pyongyang Declaration and Military Agreement for the Implementation of the Panmunjom Declaration. They spoke with a resolute attitude, their voices filled with conviction.

“There will no longer be war on the Korean Peninsula,” Moon declared. “We are not far away from complete denuclearization of the Korean Peninsula. Inter-Korean relations will remain steady, without faltering.”
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The principal achievements of the Pyongyang summit are the advent of peace, eliminating the threat of war and regaining momentum for denuclearization on the Korean Peninsula. And this is not just rhetoric. The military agreement is as thorough as an insurance contract. It is far more detailed than all other inter-Korean agreements to date. The document contains five appendices in addition to the main text and signals a strong commitment to action from both Moon and Kim.

The agreement contains concrete steps for demilitarizing the border, such as halting artillery and other military drills close to the demilitarized zone, and banning the entry of warships and live-fire exercises around the Northern Limit Line.

To make matters worse (for Washington), both Korean nations have immediately taken this peace agreement to the U.N., and China has blessed the agreement.
The agreement also comes with sanctions-breaking economic ties.

The leaders of the two Koreas agreed Wednesday to hold a groundbreaking ceremony to link roads and railways within the year, in a move affirming willingness to resume business cooperation “to develop the nation’s economy in a balanced manner” on the Korean Peninsula.

The two sides also agreed to normalize stalled operations of the Kaesong industrial park and the Kumgangsan tour program “as conditions ripen.”

This is the exact thing that Washington didn't want. Only a few days ago, US Ambassador to the United Nations Nikki Haley ranted that North Korea was skirting around UN Security Council sanctions, and that Russia was helping them.
In other words, Washington is giving the exact opposite message, and is completely out-of-step with the political climate.

The agreement even has things in it that Washington said that it wants.

At a news conference held in Pyongyang’s state guesthouse Paekhwawon, President Moon said that North Korea will permanently dismantle its Donchang-ri missile engine test site and launch pad and would allow international inspectors to observe. He added that the North would take the further step of closing its Yongbyon nuclear facility if the United States responded with further concessions.

"The South and the North also discussed denuclearization steps for the first time," Moon said of his talks with Kim in a joint press conference held at the North's state guesthouse Paekhwawon.

In a late-night tweet, President Donald Trump lauded Kim's diplomacy.
...The Yonhap News Agency reported Kim said he and Moon had agreed to remove all nuclear weapons and threats from the Korean Peninsula.

A day late and a dollar short, Washington has realized that the peace talks have left them behind, now are suddenly interested in a new U.S.-North Korea summit.
Most likely we will use a new summit to belligerently threaten and insult North Korea in order to derail or forestall peace breaking out for as long as possible.