North Korea's nuclear activity has continued as a continuing crisis since the Cold War. In particular, with North Korea acquiring ballistic missiles and intercontinental ballistic missiles, the crisis has spread beyond the East Asian region, causing tensions and insecurity in the international system. The United States, which from the beginning has put North Korea's nuclear disarmament program on its foreign policy agenda in the East Asian region, but With the inauguration of Donald Trump as the 45th President of the United States, he has pursued tougher policies to disarm North Korea, ranging from threats and sanctions to negotiations and agreements. So, looking at the course of Trump's confrontation and interaction with North Korea, the fundamental question arose: how can Donald Trump's foreign policy in the face of the North Korean nuclear crisis be explained? To answer this question, using the theory of James Rosenau, we examine the issue at the level of microanalysis. The research findings show that the political, security and strategic interests of each of the two countries make this crisis unresolved by Donald Trump. In this research, the method of paying attention to the problem is descriptive-descriptive and information is collected by documentary method.