Despite all the bravado and cheerleading by those who believe that North Korea would be a pushover in a war with the US, there are some realities to consider. 
Outside of it's nuclear threat, North Korea has a huge arsenal of missiles aimed at Seoul and Tokyo, capable of totally devastating them. While this may not directly be a threat to the United States, it would result in an economic collapse that would trigger a worldwide depression.  Such are the consequences  of globalism. 
So, those people cheering for war, might want to reconsider. 
Personally I don't believe that even Trump is stupid enough to attack.