Iran–United States relations during the first Trump administration

Iran–United States relations during the first Trump administration (2017–2021) were marked by a sharp policy shift from Obama's engagement-oriented approach. Trump began with a travel ban affecting Iranian citizens, and withdrew from the Joint Comprehensive Plan of Action (JCPOA). A broader maximum pressure campaign followed, with over 1,500 sanctions targeting Iran’s financial, oil, and shipping sectors, as well as foreign firms doing business with Iran, severely damaging its economy. The effort aimed to isolate Iran but met with strong resistance—even from U.S. allies—and often left Washington diplomatically isolated.

Iran responded by threatening to resume unrestricted uranium enrichment; rejecting negotiations with the Trump administration, and intensified rhetoric. Tensions escalated in 2019 with U.S. intelligence reports of Iranian threats, attacks on oil tankers, the downing of a U.S. drone by Iran, and suspected Iranian strikes on Saudi oil facilities. President Trump called off retaliatory strikes, opting for cyberattacks and additional sanctions instead.

A major escalation followed a December 2019 rocket attack on the K-1 Air Basein Iraq, which led to American airstrikes on Iranian-backed militias and a retaliatory attack on the U.S. embassy in Baghdad. On 3 January 2020, the U.S. assassinated Iranian General Qasem Soleimani in a drone strike, prompting Iranian missile attacks on U.S. bases in Iraq and heightened fears of war. The crisis deepened with the accidental downing of a Ukrainian passenger plane by Iranian forces and continued through early 2020 with retaliatory strikes and threats.

Later in 2020, Iran blamed U.S. sanctions for limiting its COVID-19 response. They launched a military satellite, and were later accused of interfering in the U.S. presidential election and proxy attacks. Relations ended under Trump with continued hostility and unresolved disputes.