President Trump cancels summit with North Korea's Kim Jong Un

CNN's Will Ripley is in North Korea, where he just witnessed North Korea appear to destroy part of a nuclear test site — an apparent good will gesture on behalf of the North Koreans.

He was wrapping up the day when he — and the rest of North Korea — got news that President Trump had canceled the planned June summit with Kim Jong Un.

Watch Ripley's interview:

Sen. Brian Schatz, a Democrat from Hawaii, urged the US to listen to "career diplomats" and other experts when dealing with US-North Korean affairs.

There are 4,661 miles of ocean between Hawaii and North Korea, making the island one of the closest US territories to Kim Jong Un's regime after Guam and Alaska. Last year, it became the first US state to prepare for the possibility of a nuclear attack from North Korea.

Here are Schatz's tweets:

Speaker of the House Paul Ryan just issued a statement after President Trump's decision to cancel the summit.

Ryan said the regime must display a "much greater degree of seriousness" if it wants a peaceful resolution. In the meantime, Ryan said, the US must not relent in its maximum pressure campaign.

Here's the statement:

CNN's Barbara Starr says the cancellation of the summit summit was "a very practical military matter" for both the US and North Korea.

Here's how she explained it:

Secretary of State Mike Pompeo is testifying this morning on his department's budget in front of the Senate Foreign Relations committee.

He just took a moment to read President Trump's full letter to North Korean leader Kim Jong Un.

Here's the moment:

Senate Foreign Relations Chairman Bob Corker told reporters that the summit cancellation is "a little bit of setback."

He added that Secretary of State Pompeo was "realistic" that the North Korea meeting may not happen. He refused to say whether Trump was too optimistic and talked too glowingly about Kim and wouldn’t criticize Vice President Pence’s remarks about North Korea.

"There was a sense it was going to happen — no question ... It’s been difficult to communicate with them" as of late, he said.

He added that North Korea was “not quite ready” to have the meeting.

President Trump cast doubt on the North Korea-US summit on Tuesday, when South Korean President Moon Jae-in visited the White House.

Before today, that comment was the clearest indication that the summit Trump agreed to in March may be at risk. Last week, North Korea adopted a harsh new tone and threatened to withdraw from the meeting, which is due to occur in Singapore.

A senior official said the threat of nuclear war from North Korea in the latest statement calling Vice President Pence a dummy was the final straw for the US ahead of the summit. 

President Trump's letter to North Korean leader Kim Jong Un canceling their upcoming meeting reads like a Dear John letter — a letter written to terminate a relationship, CNN's Jim Sciutto says.