Political scientists rarely associate Donald Trump with neoclassical realism. More often, he is described as a nationalist, a populist, or a disruptor unconstrained by theory. Yet if neoclassical realism is understood as a framework that explains foreign policy outcomes through the interaction of systemic incentives and domestic-level intervening variables, especially leader perceptions, state institutions, and societal factors, then Trump’s presidency offers a particularly vivid illustration of its core claims. His defining political impact has not been the rejection of structural constraints as such. Rather, it is the distinctive way in which he filtered systemic pressures through domestic political institutions and personal executive interpretation.
Neoclassical realism begins with a structural premise originating from structural realism (neorealism): the international system is anarchic and imposes constraints and incentives on states based on relative power distribution. Yet, systemic pressures do not translate directly into foreign policy outputs. Instead, they are mediated by domestic institutions, bureaucratic politics, and leaders’ perceptions. As Gideon Rose, who coined the term neoclassical realism, famously argued, “the scope and ambition of a country’s foreign policy is driven first and foremost by its place in the international system and specifically by its relative material power capabilities… [however] the impact of such power capabilities on foreign policy is indirect and complex, because systemic pressures must be translated through intervening variables.” In other words, structure matters, but only through the intervening variables of state power extraction, elite consensus, and leader cognition.
Trump’s presidency offers an unusually clear demonstration of this logic. Whether one approves or disapproves of his policies, it is difficult to deny that he reinterpreted America’s position in the international system in ways that dramatically shift from post–Cold War elite consensus. Yet from a neoclassical realist perspective, this divergence does not reflect the absence of structural constraint. Rather, it represents a different reading of relative decline, burden-sharing asymmetries, and the costs of global overstretch as filtered through a particular domestic political prism.
Domestically, Trump’s greatest impact was the reconfiguration of the domestic political transmission belt linking systemic pressures to foreign policy outcomes. For decades, bipartisan elite consensus in the United States translated post–1945 structural dominance into an expansive internationalist strategy: alliance maintenance, institutional leadership, and support for the liberal economic order. This consensus was reinforced by bureaucratic agencies, think tanks, and transnationally oriented economic sectors. Trump disrupted this equilibrium not by escaping systemic constraints, but by mobilizing a domestic coalition less committed to translating American power into global order maintenance.
The American presidency itself has become a central intervening variable in this process. Neoclassical realism places significant weight on leader perceptions, especially under conditions of informational uncertainty and bureaucratic contestation. Trump’s executive style centralized foreign policy interpretation in the presidency, reducing the filtering influence of traditional foreign policy institutions such as the Department of State or the National Security Council which were significantly weakened. Furthermore, communication through social media and personalized diplomacy became instruments for bypassing bureaucratic mediation, thereby increasing the direct role of leader-level threat assessment and preference formation in foreign policy initiatives.
The Republican Party underwent a parallel transformation that altered the domestic foundations of foreign policy selection. Before Trump, Republican orthodoxy largely supported alliance leadership, free trade, and an interventionist global posture consistent with U.S. structural primacy. Under Trump, however, elements of the party increasingly emphasized burden-sharing, industrial competition with strategic rivals, and disdain for alliance entanglements. From a neoclassical realist perspective, this shift mattered not because material incentives changed, but because domestic coalitional preferences altered how systemic pressures, particularly China’s rise and relative U.S. adjustment costs, were politically interpreted. This transformation cannot be explained solely by changes in the international system. The distribution of power shifted gradually and predictably, especially with China’s rise and relative U.S. retrenchment efforts. What changed more abruptly under Trumps’ leadership was the domestic willingness to absorb the costs of sustaining a liberal international order. Neoclassical realism predicts precisely this kind of divergence between systemic incentives and foreign policy output when domestic intervening variables inhibit or distort strategic adjustment.
Trump’s influence extended into broader bureaucratic and institutional contestation over foreign policy execution. Agencies traditionally responsible for maintaining continuity in alliance management, trade policy, and diplomatic signaling became sites of political conflict and subsequent submission to the president’s will and style. Intelligence assessments, diplomatic reporting, and trade negotiations were increasingly filtered through Trump’s unique interpretation of the national interest. In neoclassical realist terms, bureaucratic coherence weakened as domestic polarization increased the variance in how systemic signals were processed.
Trump also reshaped the language of American foreign policy in ways that reflected a shift in the American interpretation of structural constraints. Terms such as “America First,” “burden-sharing,” “end endless wars,” or “decoupling” did not alter the international system itself, but they reflected a recalibration of how the White House interpreted the costs of maintaining global primacy under conditions of relative diffusion of power. Language here functioned not as constitutive discourse, but as an indicator of shifting elite perceptions of systemic constraint. Trump’s presidency reflects a more explicit effort to align strategy with perceived structural realities. Neoclassical realism expects that states adjust their foreign policies when systemic conditions change, but that adjustment is mediated by domestic politics and leader cognition. As noted, Trump’s deep skepticism toward alliance asymmetries, particularly within NATO, reflected an interpretation of U.S. relative dominance as increasingly costly to sustain. European allies were therefore evaluated less as permanent fixtures of an institutional order and more as actors within a system requiring continual bargaining over burden distribution in a zero-sum setting.
Similarly, relations with strategic competitors such as China and Russia reflected a recalibration of threat perception under conditions of shifting polarity. China’s rise represented a classic neoclassical realist stimulus: a systemic challenge requiring strategic adjustment. However, the form and timing of that adjustment were shaped by domestic political incentives, including electoral coalitions sensitive to deindustrialization and trade imbalance narratives. Russia, by contrast, occupied a more ambiguous position, where leader-level perceptions occasionally diverged from bureaucratic consensus, illustrating neoclassical realism’s emphasis on cognitive filtering of systemic signals. Furthermoe, the personal connection that Trump has established with Vladimir Putin and Xi Jinping cannot be overlooked here given its impact on the president’s understanding of the strategic challenges the U.S. has been facing in Europe and in East Asia alike.
More fundamentally, Trump reconstructed the operational definition of American national interest in ways consistent with neoclassical realist expectations under conditions of perceived relative decline. Since the end of the Cold War, U.S. strategy largely assumed that unipolarity permitted the pursuit of expansive liberal order maintenance at acceptable cost. Under Trump, a more constrained interpretation emerged, emphasizing strategic prioritization, alliance cost-sharing, and selective engagement. “America First” in this sense was not an ideological rupture with realism, but a domestic political translation of perceived systemic overextension.
Trade policy illustrates this dynamic too. For decades, American administrations treated free trade as both economically beneficial and strategically reinforcing of U.S. structural leadership. Trump’s tariffs and renegotiations reflected a different interpretation: that global trade arrangements had redistributed relative gains in ways that weakened long-term American structural position. The underlying global economy had not fundamentally changed, but its implications for relative power and domestic resilience were reinterpreted through a different domestic political lens.
Trump’s relationship with Israel in his second term further underscores neoclassical realist dynamics, particularly in the interaction between alliance management and domestic political constraints. While maintaining strong material and military support for Israel as a key regional partner, his administration also introduced more transactional and conditional elements into the relationship, reflecting broader pressures to manage U.S. commitments in a resource-constrained and politically polarized domestic environment. Initiatives involving regional diplomacy, including engagement with actors such as Hamas, the Houthis, and Iran, alongside continued support for Israel’s security objectives, reflect an effort to balance systemic regional instability with domestic preferences for reduced entanglement. The resulting policy mix illustrates neoclassical realism’s central claim: alliance behavior is shaped not only by external threats and structural imperatives, but also by how domestic political coalitions and executive perceptions mediate those pressures.
Critics often portray Trump’s foreign policy as erratic or unconstrained by strategic logic. Yet neoclassical realism suggests the opposite. His presidency reflects the persistent influence of systemic constraints filtered through domestic polarization, institutional fragmentation, and leader-centered interpretation. Policy inconsistency is not evidence of absent reasoning, but rather of the complex interaction between external structure and internal mediation. Indeed, Trump’s opponents frequently responded within the same neoclassical realist logic, even if implicitly. Concerns about alliance credibility, deterrence stability, and the erosion of liberal order reflect systemic anxieties about shifts in relative power and the costs of domestic political fragmentation on strategic coherence. Both supporters and critics, in different ways, operated within a shared recognition that international structure imposes constraints that must be interpreted and transmitted through domestic institutions.
This does not imply that Trump’s foreign policy outcomes were structurally determined or uniformly successful. Neoclassical realism explicitly rejects such deterministic predictions. Domestic intervening variables can distort, delay, or redirect systemic responses, sometimes producing suboptimal strategic adjustment. Many of the tensions in Trump-era foreign policy demonstrated precisely this mismatch between structural incentives and domestic political filtration mechanisms. Nevertheless, attempts to reestablish alliance predictability, institutional leadership, and liberal economic coordination suggest that systemic constraints have not disappeared completely, even if their domestic interpretation remains contested. The cycle of disruption and partial restoration signals not ideological volatility, but ongoing adjustment to shifting global power distributions.
Ultimately, Donald Trump’s foreign policy legacy may be understood less through the lens of ideological deviation than through neoclassical realist dynamics of perception, mediation, and adjustment. He demonstrates how systemic pressures are not automatically translated into coherent strategy but are refracted through domestic political structures and executive cognition, sometimes producing abrupt redefinitions of interest and strategy. Whether history judges these adjustments as effective or misguided remains open. What is increasingly difficult to deny, however, is that Trump’s presidency illustrates a central insight of neoclassical realism: that international structure matters profoundly, but always through the imperfect and politically conditioned filters of domestic politics and human decision-making.
Further Reading on E-International Relations
