When the United States toppled Saddam Hussein in 2003, Washington hoped to help build a democratic Iraq that could become a stable partner in the Middle East. Instead, over the past two decades, Iraq’s political system has gradually evolved into something far more complex — a state whose most powerful political actors, security networks, and institutions are deeply intertwined with Iran.
Understanding how this happened is essential for shaping a more realistic U.S. policy toward Baghdad.
Iran’s influence in Iraq did not emerge overnight. Rather, Tehran pursued a patient and calculated strategy that combined political alliances, militia networks, and economic ties. By the time American combat forces withdrew from Iraq in 2011, Iran had already established deep connections across Iraq’s political and security landscape.
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Many of Iraq’s most influential post-2003 political parties had long-standing relationships with Iran. During Hussein’s rule, several Shiite opposition groups operated in exile in Iran, where they received political support and organizational backing. After the collapse of the Ba’athist regime, these groups returned to Iraq and quickly became major players in the country’s new political order.
Over time, these political relationships translated into institutional influence. Figures associated with groups such as the Badr Organization gained positions within Iraq’s security apparatus and interior ministry, allowing them to shape security policies and expand their networks within the state.
Militia groups became another central pillar of Iran’s strategy in Iraq.
Following the rise of ISIS in 2014, dozens of armed groups mobilized to defend the country. Many of these militias were later incorporated into the Popular Mobilization Forces PMF an umbrella organization formally recognized by the Iraqi government. While the PMF played a significant role in the fight against ISIS, several of its most powerful factions maintain close ties to Iran’s Islamic Revolutionary Guard Corps.
Groups such as Kataib Hezbollah and Asaib Ahl al Haq have evolved into hybrid actors that operate simultaneously as political movements, armed militias, and participants in Iraq’s state institutions. Their leaders hold seats in parliament, influence government decisions, and maintain their own armed structures.
The result is a system in which some of the most powerful actors operate both inside and outside the formal state structure.
Iran’s influence also extends into Iraq’s economy and diplomacy. Iraq has become one of Iran’s most important economic partners, particularly as Tehran seeks ways to mitigate the impact of international sanctions. Trade between the two countries has expanded significantly over the past two decades, and Iraq remains dependent on Iranian electricity and gas imports.
Politically, Iranian officials have frequently played the role of mediator during Iraqi government formation crises. Tehran has often worked behind the scenes to encourage alliances among Shiite political factions, helping shape coalition governments in Baghdad.
Despite this reality, Iraq should not be viewed simply as an Iranian proxy. Iraqi nationalism remains strong, and many Iraqis have openly criticized Iranian interference in their country’s politics. The nationwide protest movement that erupted in 2019 included widespread anger toward both domestic corruption and foreign influence.
Nevertheless, Iran’s structural influence within Iraq remains significant and deeply embedded.
For U.S. policymakers, acknowledging this reality is essential. For years, American policy has often assumed that Iraq could function as a fully independent strategic partner separate from Iran’s regional ambitions. In practice, however, Iraq’s political system operates within a complex network of relationships in which Iranian influence is a central factor.
A more realistic U.S. approach should recognize Iraq as a contested political arena rather than a simple ally or adversary. Supporting stronger Iraqi institutions, promoting economic independence, and encouraging political actors committed to national sovereignty may help create greater balance within the system.
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But none of these goals can be pursued effectively without first recognizing how deeply Iran has embedded itself in Iraq’s post-2003 political order.
Acknowledging that reality is the first step toward developing a more effective policy for the future.
Firmesk O. Rahim is a doctoral student of global governance and human security at the University of Massachusetts Boston.
