Article snippet: President Donald Trump says he told Secretary of State Rex Tillerson that any negotiations with Kim Jong Un, whom Trump called “Little Rocket Man,” are a waste of time. In an apparent response to news this weekend that the U.S. has open channels of communication with North Korea, the president also tweeted Sunday that Tillerson should save his energy because the U.S. will "do what has to be done." Kim Jong Un. The top U.S. diplomat also said that broad sanctions against North Korea over its Link to the full article to read more