The US and South Korean foreign ministers held a phone call to emphasize cooperation in resolving the North Korean nuclear issue. With President Trump's recent push to resume talks with North Korea and his announcement of reduced joint military exercises, the South Korean government has felt an increased need for cooperation with the United States. In particular, concerns have been raised that South Korea could be excluded from North Korea engagement, so this phone call aimed to understand the US position and build consensus on North Korea policy. However, uncertainties remain regarding President Trump's commitment to denuclearization and the possibility of "passing over" South Korea. Therefore, the South Korean government needs to strengthen cooperation with the United States and make efforts to persuade President Trump through high-level communication.