The "MAGA Effect": the Impact of Us Domestic Politics on Security in Europe and the Indo-Pacific

America and its allies are facing a new era of great-power competition, revealing immense internal and external forces that compel them to evolve as they contend with rising challengers to the current global order. This paper explores how changing attitudes in domestic politics, particularly the “MAGA” movement in the United States, and the rise of more conditional, capability-driven policies are reshaping alliance dynamics in both Europe and the Indo-Pacific. This study argues that US alliances are no longer evaluated solely on the basis of historical commitments or status, but on the specific strategic value that allies can provide in an era of intensifying great-power competition. Using personal experience in US domestic politics and policy, and drawing on intense qualitative analysis and field research, this paper develops a framework of “strategic complementarity,” in which allies are assessed based on the roles they play within the broader security architecture. These roles can include acting as a regional hub for coordination, industrial capacity, forward deterrence posture, diplomatic access, and more. Utilizing comparative case studies from across Europe and the Indo-Pacific, such as Japan, Australia, Hungary, and Estonia, this paper demonstrates how different states are adapting to evolving US expectations and identifies the varying and differing pathways through which allies can enhance their strategic relevance.
The findings of this paper purport that the current alliance system is rapidly undergoing a dynamic shift in which allies are no longer evaluated on their historical status but on their capability to fulfill needed strategic niches in the broader alliance framework. This shift has large implications for the future of or burden-sharing, deterrence credibility, and regional stability. While this change creates uncertainty and concerns for America’s allies, it also creates opportunities for both established and emerging partners to redefine their roles within US-led security frameworks. By revealing the intrinsic link between domestic politics and alliance behavior, this paper provides a conceptual foundation for understanding how future U.S. foreign policy, across administrations and parties, may continue to reshape the structure and function of global alliances.