I believe that if I were the president of the United States, I would try my best to have a better relationship with North Korea. Trump has recently started to build a relationship with North Korea again, especially since they have already seen each other before.
Only time will tell if the insults and the crude remarks will not start again soon. If I were the president, I would have tried to improve the relationship of the United States with North Korea from the initial meeting so that the subsequent meetings will provide more time to talk about the things that both the US and North Korea can do to become more powerful in the world.
If I were the American President, I would certainly not handle North Korea the same way President Trump is handling them. I would not use crude words, insults, counter-productive rhetoric, and bullying. I would not undermine the attempts of my secretary of state to pursue diplomatic solutions. I would never give up hope for peaceful negotiations.
I do agree with trying to build stronger coalitions with other countries in the world, especially Russia and China. I also agree with implementing sanctions and in fact, would probably attempt to implement additional sanctions more quickly. I would also look at enforcing the sanctions more consistently.