As you can understand Donald have more time for his president job, because Melania live currently in New York ( less family life means more time for work ), so he can also start to think some more strong reaction on North Korea nuclear weapons & missile programme ( see more info here - http://www.bbc.com/news/world-asia-17399847. What can happen if he will do something against North Korea ? Do not forget US obligations and US army presence in South Korea.