"We'll see what happens," Mr. Trump told reporters. "We'd like to, we'll see what happens."
For weeks, Mr. Trump had posted a steady stream of enthusiastic comments and tweets about his planned summit with Mr. Kim, though he also warned that it was not could happen.
There were signs of trouble last week when North Korea made two furious statements. North Korea withdrew for the first time from planned high-level talks with South Korea and protested against a joint military exercise between the South and the United States that described it as a dress rehearsal for the invasion.
It also warned that if Washington continued on a "one-sided" task of its nuclear arsenal, it would "no longer be interested" at a summit meeting with Mr. Trump. The North turned its rage on Mr. Trump's hardliner John R. Bolton, who demanded that North Korea dismantle its nuclear arsenal before awaiting countermeasures from Washington, such as easing sanctions or security guarantees.
When representatives of the United States arrived in Singapore last week with North Korean counterparts to prepare for the working-level summit, the North Koreans hired them, according to White House officials.
Then in an interview this week, Vice President Mike Pence reiterated Mr. Bolton's demand and warned that North Korea could end up "like the Libyan model" if Mr. Kim does not denuclearize.
In 2003, former Libya leader Colonel Muammar el-Gaddafi handed over a nuclear weapons dispenser thrown into the US in the balance and killed years later by rebels backed by Washington and its European allies.
On Thursday, North Korea named Mr. Pence a "poli tical dummy" and warned against a "nuclear showdown" with the US, which in turn threatened to cancel the summit with Mr. Trump. Hours later, Mr. Trump acted first and annulled him