More than eight years after the United States withdrew from the international nuclear accord with Iran, the relationship between the two nations has descended from diplomatic rupture into direct military strikes, ongoing enrichment violations, and allegations of assassination plots against former American officials. The Joint Comprehensive Plan of Action, painstakingly negotiated in 2015 between Iran and the P5+1 powers — the United States, United Kingdom, France, Russia, China, and Germany — remains inoperative, and no new policy steps have been announced by the current U.S. administration to break the cycle of escalation.
From Diplomatic Framework to Military Confrontation
The chain of events began on May 8, 2018, when President Donald Trump withdrew the United States from the JCPOA, the central diplomatic framework governing Iran’s nuclear program. The agreement had been reached after an interim accord in late 2013, a framework in early 2015, and a final deal that summer.
It required Iran to restrict uranium enrichment levels, reduce its stockpile, and accept enhanced inspections, with key nuclear sites repurposed for civilian research. The pact took effect in early 2016, but opposition came from Israel, Saudi Arabia, hardline factions in Iran, and U.S. Republicans. The deal preserved some U.S. sanctions unrelated to the nuclear program — those tied to Iran’s missile development and regional activities — which blunted the economic benefits Tehran had expected.
The JCPOA represented a rare diplomatic effort to address long-standing tensions through verifiable constraints rather than coercion. Its collapse after the U.S. withdrawal removed a major barrier to Iran’s nuclear expansion and deepened regional instability.
By 2019, Iran began exceeding the uranium enrichment limits set by the JCPOA. The situation escalated sharply on January 3, 2020, when a U.S. drone strike near Baghdad International Airport killed Iranian General Qasem Soleimani. Five days later, on January 8, 2020, Iran launched ballistic missiles at Al Asad Airbase and Erbil Airbase in Iraq, injuring over 100 U.S. service members.
Those military exchanges marked a direct confrontation that had not occurred in the prior years of tensions.
Legal and Intelligence Countermeasures
In August 2022, the U.S. Department of Justice charged Shahram Poursafi, an Iranian national, with plotting to assassinate John Bolton, who served as Trump’s national security advisor. In 2023, U.S. intelligence agencies reported increased Iranian threats against former U.S. officials.
On September 25, 2024, Trump claimed that Iran is plotting his assassination. Sources familiar with the broader timeline note that the pattern of escalation has not broken. The nuclear deal remains inoperative.
Iranian enrichment continues. The legal cases against Iranian operatives have not halted the intelligence community’s assessment of ongoing threats.
The U.S. administration has not announced new policy steps regarding Iran.
The Stalled Path Forward
The absence of a functioning agreement leaves few options to prevent further escalation. Today, the deal’s failure shapes the current standoff, as Iran advances its enrichment and the U.S. faces persistent security threats from Tehran. The relationship remains defined by the events of the past eight years, with no clear path toward de-escalation on the horizon.
The original JCPOA had preserved some sanctions to address Iran’s missile development and regional activities, blunting the economic relief Tehran expected. Hardline factions in Iran, along with Israel, Saudi Arabia, and U.S. Republicans, had opposed the pact from the outset.
Yet the agreement did provide verifiable constraints on Iran’s nuclear ambitions until its collapse. Now, with the diplomatic framework dismantled and enrichment continuing, the challenge for future U.S. policymakers will be to find a way back to a sustainable arrangement amid heightened distrust and a record of direct attacks and alleged plots.
