U.S. President Donald Trump has said he would absolutely be willing to talk on the phone to North Korean leader Kim Jong Un and that he hopes positive development results from talks between North Korea and South Korea. <br/><br/>Trump, answering questions from reporters at the presidential retreat at Camp David, Maryland, expressed a willingness to talk to Kim but not without preconditions. Trump said absolutely, he would do that and he has no problem with that at all. <br/><br/>Trump and Kim have exchanged insults ever since Trump took office, with Trump repeatedly calling Kim "rocket man" for testing nuclear weapons and ballistic missiles.<br/><br/>Earlier this week Trump dismissed Kim's taunt that the North Korean leader has a nuclear button on his desk, saying he has a bigger button.