Washington (CNN) White House press secretary Sarah Sanders said Monday that President Donald Trump is open to another meeting with North Korean dictator Kim Jong Un despite national security adviser John Bolton's assertion that the US is still waiting for Pyongyang to take steps toward denuclearization.

Trump has received another letter from Kim, which Sanders described Monday as "very warm" and "very positive," noting that the White House will not release the letter unless Kim agrees.

The primary intent of the letter, she said at Monday's briefing, was to "request and look to schedule another meeting" between the two leaders, something the White House is "open to."

She said that the White House is "already in the process of coordinating" another meeting, but declined to provide further details on a time or location.

She cited the letter as "further evidence of progress" toward denuclearization, noting that the latest parade was "not about their nuclear arsenal."

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