When asked if the advance team still planned to leave for Singapore today to work on the summit, Sanders said on Friday, "We’ll see. We’ve still got a few hours before that takes place."
Sanders added that the White House will be prepared if the meeting takes place on June 12.
In his letter, Trump cited anger and hostility in recent statements by Kim as a reason for pulling out of the highly anticipated meeting.
In comments published by North Korea's state-run news agency KCNA, Kim said on Friday that he wanted the United States to know Pyongyang wants to sit down at "any time" to solve problems with Washington.
"They [Pompeo and Kang] committed to remaining closely coordinated in all of their efforts to create conditions for dialogue with North Korea," the release said.
The State Department the two officials reiterated the mutual goal of achieving a complete denuclearization of the Korean peninsula.