With North and South Korea talking again, should the US be worried?

North Korea is starting off the new year with a fresh diplomatic initiative aimed at wooing South Korea ahead of next month’s Winter Olympics in Pyeongchang. But it is sticking to a decidedly harsh and familiar message for US President Donald Trump: back off and let Koreans solve their own problems. After its first talks with the South in more than two years, the North said that it would not discuss its nuclear weapons with Seoul because they were aimed only at the United States, not…