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.
it will be the third world war and Northern Korea will be destroyed . The Northern and southern Korea will become a united country of Korea. Who will win in the third world war? Just image and guess the winner.