Incoming U.S. national security adviser John Bolton,... thinks that North Korean leader Kim Jong un is using the negotiations with the U.S. to 'buy time' to develop its nuclear weapons.<br /> According to Republican Senator Lindsey Graham of South Carolina,... Bolton expressed concern over dinner a few days ago, of the North 'stalling'... as it's less than a year away from completing a nuclear weapon capable of hitting the U.S.<br />The former ambassador to the UN also said North Korea has been using the same tactic in the past.<br />And Graham, sharing Bolton's concerns,... called for President Trump to make sure the negotiations are "very focused and get quick action." <br />