Scott Horsley

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President Trump is on his way home from his historic meeting with North Korean leader, Kim Jong Un, in Singapore. There, the two leaders agreed to set aside decades of tension between their countries and launch a new era of cooperation.

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And I'm Rachel Martin in Singapore, where history has unfolded. It began with a handshake. President Donald Trump and Kim Jong Un, the leader of North Korea, then signed what they described as a historic agreement.

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Veteran diplomats say it could take years to assess the results of this week's nuclear summit between President Trump and North Korean leader Kim Jong Un.

Trump doesn't expect to wait that long.

"I think within the first minute, I'll know," whether Kim is serious about giving up his nuclear weapons, the president told reporters Saturday. "Just my touch. My feel. That's what I do."

Updated at 4:53 p.m. ET

President Trump said Thursday that his summit meeting with North Korean leader Kim Jong Un next week could be "a great success," and held out the possibility of an unprecedented invitation to the White House for Kim if all goes well in Singapore.

For decades, President Trump has presented himself as a master dealmaker.

"I've made a lot of deals," Trump told reporters last month. "I know deals, I think, better than anybody knows deals."

That was part of the shtick on Trump's long-running TV show, The Apprentice. And it's the subject of his bestselling 1987 book, The Art of the Deal.

Updated at 5:00 p.m. ET

President Trump says his nuclear summit meeting with North Korean leader Kim Jong Un is back on.

"We'll be meeting on June 12 in Singapore," Trump told reporters on the South Lawn of the White House, after escorting Kim's top deputy, Kim Yong Chol, out of an Oval Office meeting.

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UNITED STATES ARMY FIELD BAND: (Singing) Mine eyes have seen the glory of the coming of the Lord. He is...

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Expectations for this North Korea nuclear summit are shrinking, it seems.

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Updated at 4:47 p.m. ET

President Trump cautioned that his historic summit with North Korean leader Kim Jong Un may not happen as planned.

"There's a chance, there's a very substantial chance that it won't work out," Trump said during an Oval Office photo op with the president of South Korea. "I don't want to waste a lot of time. And I'm sure he doesn't want to waste a lot of time. So there's a very substantial chance that it won't work out and that's OK. That doesn't mean that it won't work out over a period of time."

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