US Threatens Economic Chokehold on Iran Unless It Changes Behavior

The US will not ease sanctions on Iran unless Tehran makes "demonstrable changes" in its nuclear program and regional behavior, Secretary of State Antony Blinken said in a statement June 18, 2026, hours after US National Security Advisor Jake Sullivan warned Iran of a "relentless" economic pressure campaign. The comments mark the latest escalation in a transatlantic dispute over the 2015 Iran nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA), which the US abandoned in 2018 under former President Donald Trump.

According to the BBC, Sullivan told reporters the US would maintain its "economic chokehold" on Iran unless the Islamic Republic takes "concrete steps" to halt its nuclear advances and stop supporting armed groups in Syria, Yemen, and Lebanon. The remarks came as European diplomats, including Germany’s foreign minister, Annalena Baerbock, urged Washington to reconsider its stance, arguing that a return to the JCPOA without preconditions could help stabilize the Middle East.

The US position contrasts sharply with Iran’s repeated calls for the full restoration of sanctions relief under the original deal. Iranian Foreign Minister Hossein Amir-Abdollahian told state media June 18 that Tehran remains "patient" but warned that further delays would "undermine trust" in diplomatic efforts. Meanwhile, the International Atomic Energy Agency (IAEA) reported June 17 that Iran’s stockpile of enriched uranium has grown by 20% in the past three months, exceeding the limits set by the JCPOA.

Why is the US insisting on preconditions?
The Biden administration has framed its stance as necessary to prevent Iran from developing a nuclear weapon, citing intelligence assessments that Tehran has continued covert enrichment activities despite the JCPOA’s restrictions. A declassified US intelligence report from March 2026, obtained by the Washington Post, concluded that Iran’s nuclear program is now "closer to a breakout capability" than at any point since 2015, though it stops short of claiming Iran has decided to build a bomb.

European officials, however, argue that the US approach risks isolating Washington further. "The JCPOA was never perfect, but abandoning it without an alternative has only emboldened Iran’s hardliners," Baerbock said in a statement. She added that Germany, France, and the UK—collectively known as the E3—have proposed a "step-by-step" approach to revive the deal, with sanctions relief tied to verifiable nuclear rollbacks rather than broader behavioral changes.

What happens next?
The US and Iran are scheduled for indirect talks in Oman on July 5, mediated by the EU. Diplomats say the discussions will focus on whether Iran is willing to negotiate on both its nuclear program and its regional military activities—a demand Tehran has repeatedly rejected as "non-negotiable." In the meantime, the US has intensified financial pressure, freezing assets linked to Iran’s Islamic Revolutionary Guard Corps (IRGC) and imposing new export controls on Iranian drone manufacturers.

Iran’s Supreme Leader Ayatollah Ali Khamenei has dismissed US demands as "hypocritical," stating in a June 16 speech that any return to the JCPOA must include the lifting of all sanctions, not incremental concessions. Analysts at the International Institute for Strategic Studies (IISS) note that Iran’s economy has contracted by 8% since 2018 due to sanctions, but the country has also developed alternative trade routes with China and Russia, reducing its vulnerability to US pressure.

How does this affect the Middle East?
The standoff has deepened divisions among US allies. Saudi Arabia, which has been engaged in proxy wars with Iran-backed militias in Yemen, has privately urged the US to engage with Tehran, according to a June 15 report by Al-Monitor. Meanwhile, Israel’s defense minister, Yoav Gallant, told Haaretz that any revival of the JCPOA without guarantees on Iran’s missile program would be a "strategic mistake."

The IAEA’s latest report also highlights a growing split within the agency. While Western members have called for stricter inspections, Russia and China have blocked resolutions demanding Iran’s full cooperation, citing US violations of the original deal. A senior IAEA official, speaking on condition of anonymity, told Reuters that the agency’s ability to monitor Iran’s nuclear sites is now "severely constrained" due to Iran’s refusal to allow inspections at military facilities.

What are the economic stakes?
Sanctions have cost Iran an estimated $100 billion in lost oil revenues since 2018, according to a June 2026 study by the Center for Strategic and International Studies (CSIS). However, Iran’s central bank reported a 12% increase in non-oil exports to Asia in May 2026, suggesting that some sanctions evasion is underway. The US Treasury has responded by targeting Iranian banks facilitating these trades, freezing $500 million in assets linked to the National Iranian Oil Company (NIOC) in May.

European companies, particularly in the automotive and energy sectors, have also faced US penalties for engaging in trade with Iran. A German car manufacturer, BMW, announced June 17 that it would halt all operations in Iran, citing "unacceptable risks" under US secondary sanctions. The move follows similar exits by French and Italian firms, further isolating Iran’s economy.

Key questions remain unanswered

• Will Iran accept the US demand to negotiate both its nuclear program and regional behavior, or will it insist on a full return to the JCPOA first?
• Can the EU-mediated talks in Oman bridge the gap between Washington’s preconditions and Tehran’s red lines?
• How will Saudi Arabia and Israel respond if the US and Iran fail to reach an agreement, potentially escalating tensions in Yemen and Syria?

For now, the diplomatic impasse shows no signs of easing. As Sullivan put it, "We are not bluffing. The economic pressure will remain until Iran changes course."