"Now, one thing President Trump has said beginning in the 2016 campaign is that he's not going to make the mistakes of prior administrations and get into this action for action kind of arrangement which benefits the North Koreans".
Warmbier's parents spoke out after Trump returned home after his summit with the North Korean leader.
John Bolton, in three television interviews, tried to make that case that Trump advanced America's national security interests by rejecting a bad agreement while working to persuade Kim to take "the big deal that really could make a difference for North Korea".
"The sanctions the president did not lift on North Korea are named after Otto and I think the president clarified that", he said.
After a second summit with Kim in Vietnam last week, Mr Trump said he accepts the North Korean dictator's denial that he knew of Mr Warmbier's condition in captivity.
When asked about Cohen's testimony at a press conference on Thursday in Hanoi after Trump had abruptly chose to end the summit with Kim early, the president called the allegations "incorrect" and criticized the decision to have the hearing while he was away.
"Good for them", Bolton said.
The New York Times recently reported that US President Donald Trump overruled objections from the security establishment and ordered officials to issue top-secret security clearance to his son-in-law and senior administrative aide Jared Kushner. "He deepened his relationship with Kim Jong Un".
"The President is fully prepared to keep negotiating at lower levels or to speak to Kim Jong Un again when it's appropriate", he said.
"It doesn't mean he accepts it as reality", Bolton added.
Trump shocked Washington and upset the Warmbier family when he said he didn't condemn Kim for the death of Warmbier, the 22-year-old who was imprisoned in North Korea in 2016 and died the following year being returned to the USA in a vegetative state. "I think Kim knew what happened, which was wrong", McCarthy said. "That's what matters, not my view".
But Bolton told CBS's "Face the Nation" Trump's failure in getting commitments from Pyongyang on destroying its nuclear capability should be seen as "a success, defined as the president protecting and advancing American national interests".
"This is, I think, the result of a president who is not prepared for these kind of negotiations, a staff that is not well-prepared and that is essentially flying by the seat of its trousers, and it has real-world consequences", Schiff said. "Bolton, for his part, denied that the meeting was a "failure" and praised Trump for "[turning] traditional diplomacy on its head".
"The reason I do not want military drills with South Korea is to save hundreds of millions of dollars for the United States for which we are not reimbursed", Trump tweeted today. "I give my advice to the president".
But host George Stephanopoulos noted that Trump never specifically blamed Kim for Warmbier's killing.