Carla B. Abdo-Katsipis

For decades, American presidents have sought to convince allies and adversaries alike that U.S. foreign policy rests on enduring national interests rather than the preferences of any single leader. That credibility has long been one of Washington’s greatest strategic assets. Today, however, the distinction between American strategy and presidential personality is becoming increasingly blurred.

Nowhere is this more evident than in U.S. policy toward Iran.

Since returning to office, President Donald Trump has alternated between military escalation, economic coercion, and intermittent diplomatic overtures. The administration has defended this approach as one of “peace through strength,” arguing that unpredictability enhances deterrence by denying Tehran the ability to anticipate Washington’s next move. Yet recent military operations and the collapse of diplomatic efforts have renewed questions about whether American policy reflects a coherent long-term strategy or an increasingly personalized style of decision-making.

This distinction matters because deterrence depends on more than military capability. It also depends on credibility, consistency, and the ability of adversaries to understand the political logic behind the use of force. When foreign governments struggle to distinguish between institutional strategy and presidential instinct, the risk of miscalculation increases.

The personalization of American foreign policy did not begin with Trump. George W. Bush’s response to September 11 fundamentally reshaped U.S. grand strategy around his conception of the “Global War on Terror.” Barack Obama invested extraordinary personal political capital in negotiating the Joint Comprehensive Plan of Action, making engagement with Iran a defining feature of his presidency. Joe Biden likewise centralized decision-making during successive Middle East crises.

Trump, however, has amplified the trend. Throughout both of his presidencies, he has favored direct presidential diplomacy, rapid shifts in negotiating positions, public bargaining, and strategic ambiguity. His supporters argue that this approach keeps adversaries uncertain and creates negotiating leverage. His critics contend that it weakens institutional planning and complicates alliance management. Both perspectives capture part of the picture.

The larger issue is structural.

Over the past two decades, technological change, the twenty-four-hour news cycle, and the expansion of executive authority have concentrated foreign policy in the White House to an unprecedented degree. Presidential social media posts, interviews, and impromptu remarks frequently shape international expectations before formal policy has been coordinated across the national security bureaucracy. The president increasingly becomes both the chief strategist and the principal messenger, compressing what was once a layered decision-making process into a highly personalized form of statecraft.

Iran is particularly well positioned to exploit this dynamic.

Unlike conventional military rivals, Tehran rarely responds to American pressure in a linear fashion. Iranian strategy emphasizes patience, asymmetric warfare, calibrated escalation, and long-term political endurance. Rather than matching U.S. military power directly, Iranian leaders evaluate Washington’s domestic politics, alliance cohesion, and willingness to sustain pressure over time.

Consequently, Iran studies not only what the United States does, but why it appears to be acting.

If American military operations appear connected to clearly articulated strategic objectives, Tehran can incorporate those signals into its own calculations. If policy appears to shift rapidly in response to domestic political pressures or presidential impulses, however, Iranian decision-makers may conclude that waiting for political circumstances to change offers greater advantages than making concessions. Such perceptions can weaken deterrence without reducing American military superiority.

Personalized decision-making also creates complications for America’s partners.

European governments, Gulf monarchies, and Israel depend upon reasonably consistent American strategic signaling when coordinating sanctions, military planning, intelligence cooperation, and diplomatic initiatives. Tactical flexibility is often useful during crises, but excessive variability in public messaging can generate uncertainty among allies as well as adversaries. Coalition cohesion depends not only on shared objectives but also on confidence that American policy will remain broadly consistent beyond the next presidential statement or electoral cycle.

This problem extends beyond Iran. It reflects a broader evolution in American statecraft in which institutional processes increasingly compete with presidential branding. Modern presidents understandably seek ownership of major foreign policy successes, yet personalization carries strategic costs. Policies identified too closely with one individual often become politically difficult to sustain after administrations change, reducing the long-term credibility of American commitments.

None of this suggests that presidents should relinquish decisive leadership. Crises demand timely decisions, and excessive bureaucratic deliberation can prove equally damaging. The challenge is ensuring that presidential authority operates within a framework that communicates continuity rather than improvisation.

Washington can take several practical steps to reinforce that framework. The National Security Council should play a more visible coordinating role in explaining how military actions support broader strategic objectives. Major decisions involving Iran should be accompanied by clear public statements outlining political end states rather than focusing solely on operational successes. Consultation with Congress and key allies should become a routine component of crisis management, strengthening the perception that U.S. policy reflects national strategy rather than individual preference. Most importantly, administrations should distinguish between tactical ambiguity—a legitimate tool of deterrence—and strategic ambiguity, which risks convincing both partners and adversaries that American objectives themselves are uncertain.

Military power remains the foundation of American deterrence, but power alone cannot sustain strategic credibility. Adversaries evaluate not only capabilities but also decision-making processes. Allies judge not only commitments but also consistency. When foreign policy becomes identified primarily with one president’s instincts, the distinction between the United States and its leader begins to erode.

That is the real strategic risk. The question is not whether President Trump—or any president—should exercise decisive leadership. The question is whether America’s friends and rivals continue to see U.S. policy as the product of enduring national interests rather than the personality of the individual occupying the Oval Office. In an era of renewed confrontation with Iran, preserving that distinction may prove as important as any military deployment or diplomatic initiative.