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Former Obama official: 'No substance' to Trump's diplomatic efforts in North Korea

A former Obama official criticized President TrumpDonald John TrumpNearly 300 former national security officials sign Biden endorsement letter DC correspondent on the death of Michael Reinoehl: 'The folks I know in law enforcement are extremely angry about it' Late night hosts targeted Trump over Biden 97 percent of the time in September: study MORE’s historic meeting with North Korean leader Kim Jong UnKim Jong UnBlessing for Trump: a campaign devoid of foreign policy Bolton: North Korea 'more dangerous now' North Korea unveils large intercontinental ballistic missile at military parade MORE, saying it had “no substance.”

“Where is the progress other than the photo ops in North Korea?” asked Roger Fisk, who served on President Obama's 2013 inaugural committee.

“There’s no substance there,” he added. “Every other president ... had preconditions before they would even sit down with Kim Jong Un or his father or his father’s father.”

President Trump on Sunday became the first sitting U.S. president to step over the heavily guarded Demilitarized Zone (DMZ) into North Korea to meet with Kim for a surprise negotiation session, where the two leaders agreed to restart stalled nuclear talks.

But Fisk argued that when Trump stepped over the DMZ line, he “hemorrhaged massive amounts of American credibility.”

“Not having any real understanding about our history there and capping off a 100-hour global tour in which he was hostile to our allies,” he added in reference to G-20 meeting last weekend in Osaka, Japan. “He cosied up with every single thug or dictator in the world.”

Trump has received a mix of praise and criticism following his trip to Asia.

While many fellow Republicans including New Jersey Gov. Chris Christie (R) hailed the visit as a breakthrough in talks, some Democratic presidential candidates and human rights advocates panned the visit in light of the death of American college student Otto Warmbier, who was detained in North Korea before his death.

“Our President shouldn’t be squandering American influence on photo ops and exchanging love letters with a ruthless dictator,” Sen. Elizabeth WarrenElizabeth WarrenOvernight Health Care: Trump takes criticism of Fauci to a new level | GOP Health Committee chairman defends Fauci | Birx confronted Pence about Atlas Senate Democrats call for ramped up Capitol coronavirus testing Government watchdog to investigate allegations of Trump interference at CDC, FDA MORE (D-Mass.), tweeted following the meeting. “Instead, we should be dealing with North Korea through principled diplomacy that promotes US security, defends our allies, and upholds human rights.

Sens. Bernie SandersBernie SandersThe Hill's Morning Report - Sponsored by Goldman Sachs - Tipping point week for Trump, Biden, Congress, voters Biden and Schumer face battles with left if Democrats win big Push to expand Supreme Court faces Democratic buzzsaw MORE (I-Vt.) and Amy KlobucharAmy Klobuchar Senate Democrats call for ramped up Capitol coronavirus testing Senate Democrats seek to alleviate public concern about some results not being available on election night Washington flooded with Women's March protesters ahead of Barrett confirmation vote MORE (D-Minn.) also criticized the meeting, along with former San Antonio Mayor Julián Castro.

—Tess Bonn