Trump North Korea Timeline

FILE - This combination of two file photos shows U.S. President Donald Trump, left, speaking during a roundtable discussion on tax cuts in Cleveland, Ohio, May 5, 2018 and North Korean leader Kim Jong Un, right, talking with South Korean President Moon Jae-in in Panmunjom, South Korea, April 27, 2018. U.S. Secretary of State Mike Pompeo arrived in North Korea on Wednesday, May 9, 2018, to finalize details of a planned summit between President Donald Trump and North Korea leader Kim Jong Un. (AP Photo/Manuel Balce Ceneta, Korea Summit Press Pool via AP, File)

WASHINGTON (AP) — President Donald Trump says North Korea's leader should not "hesitate to call me or write" if he changes his mind about their now-canceled summit.

Trump announced Thursday that he had canceled a summit planned with Kim Jong Un in Singapore on June 12.

Trump released a letter to Kim saying his decision was based on "the tremendous anger and open hostility" in Kim's most recent statement. Trump did not explain what triggered his decision.

But in a statement, the North Korean government had 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.

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