South Korea Is Not Turning Away from the United States: Alliance Continuity, Strategic Adaptation, and the Limits of Ideological Interpretation

J.R. Kim/

President, KCPC

1. Introduction

As the Lee Jae-myung administration marks its first year in office, assessments of changes in South Korea’s foreign policy and the future trajectory of the ROK–U.S. alliance have become increasingly active. Since President Lee’s election in June last year, a central question among both domestic and international policy communities has been how the new administration would manage its alliance with the United States and recalibrate its relationship with China.

Among the more pessimistic arguments in this debate is an article by Nicholas Eberstadt and Lawrence Peck, “South Korea Takes a Hard Left Turn Against America,” published in the Wall Street Journal. The authors characterize the Lee administration as fundamentally unfriendly toward the United States and argue that its policy direction could ultimately lead to a weakening of the ROK–U.S. alliance.

However, such an assessment does not adequately reflect the actual policies of the South Korean government or the current state of the alliance. While legitimate criticism and disagreement may exist regarding specific policies of the Lee administration, the conclusion that South Korea is drifting away from democracy and the ROK–U.S. alliance is not sufficiently supported by observable policy behavior or by the institutional realities of the alliance.

Rather, the analysis by Eberstadt and Peck relies heavily on ideological labeling and selective evidence, failing to account for the complex and multifaceted nature of South Korean politics and foreign policy, thereby reducing it to an overly simplified interpretation.

2. Alliance Continuity and Historical Context

At the core of their argument is the claim that the Lee administration is inherently anti-American and ultimately seeks to weaken the ROK–U.S. alliance. However, the evidence presented to support this broad conclusion is limited.

Policy differences between allies are not unusual, nor do such differences necessarily imply strategic divergence. Indeed, a review of the history of the ROK–U.S. alliance shows that successive South Korean governments, regardless of their progressive or conservative orientation, have repeatedly differed with Washington on issues such as North Korea policy, China policy, and defense cost-sharing. Nevertheless, such disagreements have largely been managed within the framework of the alliance and have not fundamentally undermined its continuity or stability.

Moreover, policy disagreements on specific issues do not equate to opposition to the alliance itself. Such differences are common among sovereign democratic allies and should not be interpreted as evidence of hostility or strategic realignment. Since the Korean War, South Korea has maintained close military cooperation with the United States and continues to rely heavily on U.S. security commitments and extended deterrence in responding to North Korea’s evolving threats. In addition, the two countries have developed deeply institutionalized cooperation in defense, intelligence, advanced technology, economic security, and supply chain resilience.

Given these structural realities, it is difficult to conclude that South Korea is undergoing an anti-American shift or moving away from the alliance on the basis of a change in administration or limited policy disagreements. Several former U.S. diplomats and Korea specialists similarly emphasize that political change in South Korea does not automatically translate into alliance weakening, highlighting instead the institutional resilience of South Korean democracy and the structural durability of the alliance.

3. The Empirical Reality of the Alliance

In practice, South Korea remains one of the United States’ most important allies. The two countries maintain extensive military cooperation and intelligence-sharing mechanisms and continue to expand collaboration in areas such as advanced technology, supply chain stability, and economic security. In the face of North Korea’s advancing nuclear and missile capabilities, South Korea continues to rely on U.S. extended deterrence, while the United States regards South Korea as a key pillar of its Indo-Pacific strategy.

Most importantly, the actual policies pursued by the Lee administration merit careful attention. Since taking office, the administration has repeatedly reaffirmed that the ROK–U.S. alliance constitutes the cornerstone of its foreign and security policy. President Lee, shortly after his inauguration, held a phone call with U.S. President Donald Trump, emphasizing the importance of the alliance and the need for close cooperation. The two countries have since maintained regular high-level consultations through diplomatic and national security channels.

More concretely, the administration’s policies are broadly consistent with this official stance. South Korea has not called for the reduction or withdrawal of U.S. Forces Korea and has maintained the existing combined defense posture. It has continued large-scale joint military exercises with the United States and sustained cooperation on extended deterrence and nuclear consultation mechanisms. In other words, the core institutional and security architecture of the ROK–U.S. alliance has remained intact under the current administration.

The Lee administration has also maintained trilateral security cooperation among South Korea, the United States, and Japan. It has not sought to terminate the General Security of Military Information Agreement (GSOMIA), and the real-time missile warning data-sharing mechanism has been preserved. Despite domestic political sensitivities surrounding relations with Japan, the administration regards trilateral security cooperation as an important policy asset for strengthening regional deterrence and reinforcing the ROK–U.S. alliance.

Furthermore, strategic cooperation is expanding beyond traditional military security into economic security. South Korea continues to deepen collaboration with the United States in shipbuilding, semiconductors, batteries, and artificial intelligence, while also exploring cooperation in naval maintenance, repair, and overhaul (MRO). This reflects not alliance contraction, but rather modernization and functional expansion.

4. U.S. Policy Assessments and Alliance Stability

This reality is broadly consistent with official assessments issued by the U.S. government. Washington has repeatedly reaffirmed its commitment to the ROK–U.S. alliance while emphasizing alliance modernization and the expansion of its cooperative scope. Public statements by U.S. foreign and security officials indicate that current U.S. priorities lie less in concerns over alliance weakening and more in strengthening deterrence, expanding economic security cooperation, and deepening Indo-Pacific strategic coordination.

While external commentators may offer varying interpretations of the alliance’s future, the U.S. government’s assessment—responsible for formulating and implementing alliance policy—should also be treated as a critical analytical reference point. If South Korea’s policies were perceived as undermining the alliance, U.S. officials would likely have expressed concern through public statements or policy adjustments. However, the prevailing U.S. position continues to emphasize continuity, modernization, and expanded cooperation rather than decline or disengagement.

5. China Policy and Strategic Complexity

Eberstadt and Peck tend to interpret South Korea’s greater diplomatic flexibility as evidence of strategic realignment away from the United States. Yet South Korea, like many U.S. allies, operates within a complex strategic environment in which it must maintain a security alliance with the United States while managing deep economic interdependence with China. Accordingly, efforts to maintain stable relations with China cannot automatically be equated with strategic distancing from the United States.

Unlike during the Cold War, most U.S. allies today pursue dual-track strategies: maintaining security cooperation with the United States while sustaining significant economic ties with China. Japan, Australia, and major European states all exhibit this pattern. The United States itself has adopted a “de-risking” approach rather than full decoupling, focusing on semiconductors, advanced technologies, and critical supply chains. Diplomatic engagement with China therefore cannot automatically be interpreted as evidence of strategic alignment.

International alliance politics today operate on a more complex logic than Cold War-era assumptions that security and economic relations must align. Reducing interstate behavior to zero-sum logic risks oversimplifying reality. South Korea’s approach reflects geopolitical and economic constraints rather than ideological alignment. Pursuing differentiated policies in security and economic domains is a common pattern among middle powers.

6. Domestic Politics and Democratic Resilience

The portrayal by Eberstadt and Peck of South Korean domestic politics also relies on exaggerated interpretations. The authors characterize the Democratic Party as “radical left” and suggest that constitutional reform could lead to authoritarian rule. However, such claims are largely speculative and fail to reflect the resilience of South Korea’s democratic institutions.

South Korea remains a competitive multiparty democracy with an independent judiciary, free press, vibrant civil society, and high political participation. Constitutional revision requires approval by both the National Assembly and a national referendum, ensuring strong institutional constraints. While democratic backsliding is a legitimate concern in any democracy, current evidence does not support the conclusion that South Korea is undergoing authoritarian transformation.

7. Historical Interpretation and Alliance Frictions

The authors also selectively interpret historical and policy issues. Participation in 1980s democratization movements does not determine contemporary foreign policy orientation, as such backgrounds exist across both progressive and conservative camps. Linking decades-old activism to present-day anti-Americanism involves a significant analytical leap.

Similarly, legal disputes involving foreign firms, USFK facilities, and intelligence issues are typical institutional frictions within alliances. Comparable cases exist among U.S. alliances in Europe. These should be understood as managed disagreements within institutional frameworks rather than evidence of strategic rupture.

8. The Limits of Ideological Interpretation

Ultimately, the most fundamental limitation of Eberstadt and Peck’s analysis is its tendency to reduce diverse policy choices to ideological categories. Engagement with China becomes “pro-China alignment,” policy divergence becomes “anti-Americanism,” and constitutional debate becomes “authoritarian drift.” This framework fails to capture the complexity of South Korea’s strategic environment and democratic politics.

Such an approach underestimates South Korea’s capacity to simultaneously maintain its alliance with the United States while advancing its own security and economic interests. Policy flexibility among allies is a normal feature of international politics and does not, in itself, indicate strategic defection.

9. Conclusion

The ROK–U.S. alliance has endured for more than 70 years not because it reflects the preferences of any single government, but because it is grounded in shared strategic interests, institutionalized cooperation, and broad public support in both countries. Despite changes in political leadership and periodic policy disagreements, the alliance has remained structurally stable.

South Korea is not turning away from the United States. Rather, it is pursuing its national interests within a complex strategic environment while maintaining democracy and the alliance as core foundations. Interpretations of democratic collapse or strategic realignment lack sufficient empirical support.

Ultimately, assessments of South Korea’s foreign policy and the future of the ROK–U.S. alliance should be grounded in observable policy behavior, institutional continuity, and shared strategic interests rather than ideological inference. The evidence to date supports not alliance erosion or strategic defection, but alliance adaptation and development in response to evolving strategic conditions.