"Presidents and administrations have been talking to North Korea for 25 years, agreements made and massive amounts of money paid....hasn't worked, agreements violated before the ink was dry, makings fools of US negotiators. Sorry, but only one thing will work!" Trump wrote in two tweets.
Trump had recently called out Secretary of State Rex Tillerson, saying he was wasting time with trying diplomacy in handling Pyongyang; in response, Tillerson reportedly called Trump a "fucking moron."
Speaking to reporters, Trump said that reports on the moron remark were "fake news".
Trump added that they shared a "good relationship."
However, Trump said that Tillerson could be "tougher" although he refrained from elaborating further.