Trump says 'I have confidence' after past North Korea missile tests

President TrumpDonald John TrumpKaine: Obama called Trump a 'fascist' during 2016 campaign Kaine: GOP senators should 'at least' treat Trump trial with seriousness of traffic court Louise Linton, wife of Mnuchin, deletes Instagram post in support of Greta Thunberg MORE on Saturday dismissed concerns about missile tests earlier this month and said he had confidence in North Korean Leader Kim Jong UnKim Jong UnSouth Korea and the billion mustache North Korea replaces its foreign minister: report Brent Budowsky: The patriotic duty of Senate Republicans MORE.

"North Korea fired off some small weapons, which disturbed some of my people, and others, but not me," he wrote. "I have confidence that Chairman Kim will keep his promise to me."

National security adviser John BoltonJohn BoltonRomney: 'It's very likely I'll be in favor of witnesses' in Trump impeachment trial George Conway: Witness missing from impeachment trial is Trump Democrats see Mulvaney as smoking gun witness at Trump trial MORE on Saturday called the North Korean missile tests a violation of United Nations resolutions

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“U.N. Security Council resolutions prohibit North Korea from firing any ballistic missiles,” Bolton told reporters in Tokyo, according to The Associated Press ahead of Trump's arrival Saturday. “In terms of violating U.N. Security Council resolutions, there is no doubt about that.”

The president also said he "smiled" when Kim referred to 2020 Democratic front-runner former Vice President Joe BidenJoe BidenDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters George Conway: Witness missing from impeachment trial is Trump MORE as a "low IQ individual."

North Korean state media outlet KCNA on Tuesday called Vice President Joe Biden a “fool of low IQ”  after Biden called Kim a tyrant.

President Trump is in Japan this weekend to meet with Prime Minister Shinzo Abe.