WASHINGTON (AP) — President Donald Trump is telling North Korea's Kim Jong Un in a letter that the world is losing a "great opportunity for lasting peace and great prosperity and wealth" now that their summit has been canceled.

Trump on Thursday canceled the planned June 12 summit in Singapore with Kim, citing the "tremendous anger and open hostility" in a recent statement from North Korea.

In the statement, the North Korean government referred to Vice President Mike Pence as a "political dummy" and said it is just as ready to meet in a nuclear confrontation as at the negotiating table.

Trump says in the letter: "This missed opportunity is a truly sad moment in history."

The President also tells Kim "please do not hesitate to call me or write" should he change his mind about a one-on-one meeting.