Joseph Yun. Photo: Toru Yamanaka/AFP/Pool/Anadolu Agency/Getty Images

Former U.S. Special Representative for North Korea Joseph Yun told CNN Monday that he signed an agreement in 2017 to pay Kim Jong-un's regime $2 million for Otto Warmbier’s hospital care, a decision he believes was approved by President Trump.

The big picture: Trump has denied that the U.S. paid North Korea any money under the deal after the Washington Post reported its existence last week. National security adviser John Bolton confirmed on "Fox News Sunday" that an administration official did sign such a document.

Go deeper: North Korea billed U.S. $2 million before returning Otto Warmbier

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Biden is highest-spending political candidate on TV ads

Joe Biden. Photo: Sean Rayford/Getty Images

After spending an additional $45.2 million on political ads this week, former Vice President Joe Biden has become the highest-spending political candidate on TV ads ever, according to data from Advertising Analytics.

By the numbers: In total, the Biden campaign has spent $582.7 million on TV ads between 2019 and 2020, officially surpassing Michael Bloomberg's record spend of roughly $582 million. Biden's spend includes his primary and general election advertising.

SurveyMonkey poll: Trump improves, but not enough

Trump and Biden during the final debate. Photo: Xinhua/Liu Jie via Getty Images

President Trump's final debate performance exceeded Americans' expectations, but it wasn't enough to shift the dynamics that left him trailing Joe Biden across most measures, according to a new Axios-SurveyMonkey poll.

What they're saying: "Liar" was the word used most by debate watchers to describe Trump's performance, followed by "lies," "strong," "presidential" and "childish." "Presidential" was the word used most to describe Biden's performance, followed by "liar," "weak," "expected" and "honest."