Seoul: Key elements of the new U.S. National Security Strategy (NSS) are raising questions over South Korea's security and its role in a broader regional context, as the strategy shifts focus from North Korea's denuclearization to prioritizing Taiwan's defense and reinforcing American influence in the Western Hemisphere.
According to Yonhap News Agency, the White House released the NSS on Thursday, which outlines a plan to enforce President Donald Trump's version of the 1823 Monroe Doctrine and calls for South Korea and Japan to bolster their capabilities to defend the First Island Chain. This string of islands, including Japan, Taiwan, and the Philippines, is critical to America's stance against China in the Pacific, yet the document notably omits any mention of North Korea.
The 33-page NSS document is released as Seoul and Washington work to "modernize" their alliance, potentially increasing South Korea's role in its defense and contributions to regional security challenges, especially those posed by China. The strategy emphasizes the United States' desire for South Korea and regional allies to safeguard maritime security in the Indo-Pacific, a region where China's territorial claims and activities have been a consistent concern for U.S. policy.
Amidst these developments, South Korea is navigating a complex geopolitical landscape, balancing pragmatic foreign policy to maintain stable relations with China-a key trade partner and diplomatic ally for North Korea's denuclearization efforts. The NSS indicates a call for Asian allies to defend the strategic perimeter of the First Island Chain, though there are concerns in Seoul that such security activities may complicate its focus on deterring North Korea and provoke friction with China.
Observers suggest that Washington may pressure Seoul to prevent China from invading Taiwan, while the U.S. desires greater operational flexibility for its troops in South Korea to address China-related contingencies. A recently released joint fact sheet on trade and security agreements between South Korea and the U.S. highlights an agreement to enhance U.S. deterrence against "all regional threats," a move seen as urging Seoul to help deter China.
Additionally, Trump's approval for South Korea to build nuclear-powered submarines is perceived as part of a U.S. effort to leverage ally contributions against China. Earlier this week, Jonathan Fritz, principal deputy assistant secretary of state for East Asian and Pacific affairs, cited the submarine approval as a clear example of cooperation to enhance collective defense capabilities.
The NSS's omission of North Korea's denuclearization raises questions about the priority of nuclear diplomacy with Pyongyang in Washington's agenda. The focus instead appears to be on homeland security, Western Hemisphere preeminence, and Taiwan security, suggesting a push for South Korea to take a primary role in conventional defense against North Korean threats and seek wartime operational control from the U.S.
Patrick Cronin, chair for Asia-Pacific security at the Hudson Institute, notes that the omission may preserve diplomatic flexibility for a potential summit between Trump and North Korean leader Kim Jong-un. The 2017 NSS under Trump aimed for complete denuclearization of the Korean Peninsula, while the 2022 version under Biden continued this goal.
Emphasizing an America First approach, the NSS criticizes past U.S. policymakers for allowing allies to offload defense costs on America and dragging the U.S. into irrelevant conflicts, reflecting a course correction under the Trump administration.