North Korea is behaving very badly. They have been "playing" the United States for years. China has done little to help!
— Donald J. Trump (@realDonaldTrump) March 17, 2017
The tweet comes at a tense time for the region. Secretary of State Rex Tillerson is currently in South Korea and has made several statement about the country's northern neighbor. He initially said that North Korea has nothing to fear from the U.S.. Then, on Friday, he said that he would not rule out military action against the country.