(TOKYO) — Seemingly contradicting his national security adviser, President Donald Trump on Sunday played down North Korea’s recent missile tests and said they were not a concern for him. The comments tweeted during his trip to Japan were sure to unnerve leaders of the U.S. ally that, unlike America, is threatened by short-range weapons from its Asian neighbor. Trump also said North Korea’s Kim Jong Un’s criticism of Joe Biden, the former vice president who is among the Democrats running for the White House in 2020, made him smile. The remarks were the latest example of Trump’s willingness to publicly undermine his senior advisers, flout democratic norms and side with totalitarian leaders. “North Korea fired off some small weapons, which disturbed some of my people, and others, but not me,” Trump tweeted in one of a flurry of early morning messages. North Korea fired off some small weapons, which disturbed some of my people, and others, but not me.