You don’t need any anonymous sources to convince you that this is plausible. What you already know about Pompeo and Bolton is enough. The North Korea negotiations are Pompeo’s baby; he’s so invested in the process that he’s already met face-to-face twice with Kim Jong Un in Pyongyang. As chief diplomat, he’s all-in on dialogue between the two countries. Bolton, meanwhile, is as vocal a skeptic of diplomacy with the North as it gets on the right. He was rolling his eyes on TV about the possibility of a peace deal before he became NSA, believing that North Korea has sunk far too much of its prestige into a nuclear equalizer with the United States to ever give up its weapons.
Bolton’s also the guy who infuriated the NorKs by talking about the “Libyan model” of denuclearization a few weeks ago on American television. That led to a series of belligerent statements from Pyongyang, which in turn led to Trump pulling out of the summit. Remember who encouraged him to do that, per NBC?