The straight ahead messaging from two former officials who know better than perhaps anyone else from America's diplomatic community what it's like to actually negotiate with the North Koreans, comes as speculation and momentum mount ahead the impending summit in Hanoi.
They will meet again closer to the summit.
Biegun made the remarks during his meeting in Seoul with Republic of Korea (ROK) Foreign Minister Kang Kyung-wha, saying the DPRK and the US have been making efforts for substantial progress though issues remained to be tackled.
"I'm comfortable with it right now because I think we have to see this whole process through, because the alternative is really bad", the IL congressman said.
"We have some hard work to do with the DPRK [North Korea] between now and then", Mr Biegun added, looking ahead to the Hanoi summit.More news: Alicia Keys says 2019 Grammys will be the "sickest" yet
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The two countries have been in a security alliance since the 1950-53 Korean war, which ended with an armistice rather than a peace treaty - with more than 28,000 United States troops stationed in the South to guard against threats from Pyongyang.
Since the deal is only valid for one year, the two sides may soon have to return to the negotiating table. Trump and South Korean President Moon Jae-in will discuss the summit by phone.
Meanwhile, South Korea expects the U.S.to exempt South-North economic cooperation from sanctions. He is expected to brief South Korean officials about his visit to North Korea over the weekend.
The upcoming host, Vietnam, which has good relations Pyongyang, also has developed good ties with Washington, despite the decades-long Cold War conflict in which the United States supported South Vietnam against the North.
"North Korea and the United States have agreed to continue negotiations in a third country in Asia during the week of Feb 17", South Korean presidential spokesman Kim Eui-kyeom told reporters. "Korea summit to produce more concrete results than the first summit", Lee said. But Washington has insisted that North Korea needs to first take more concrete steps toward denuclearization.