Congress Challenges US-Iran MOU on Terms, Compliance, and INARA Obligations

The Trump administration disclosed a 14-point memorandum of understanding with Iran on June 18, 2026, sparking immediate bipartisan opposition in Congress over the scope of proposed economic relief and the status of Iran's nuclear program. Administration officials read the MOU's terms aloud to reporters on a conference call as President Trump spoke at the G7 summit in France. Written text of the MOU had not been released as of that briefing, though an official said the language was final and that the document had been signed. A formal signing ceremony is expected June 19 in Switzerland, with a 60-day period to follow during which further talks are expected to address unresolved issues, including Iran's nuclear program.

The MOU's most contested provisions involve economic commitments and the scope of sanctions relief. The U.S. and regional partners would develop a reconstruction plan for Iran worth at least $300 billion. The document further states that if a final deal is reached, the U.S. would "terminate all types of sanctions against the Islamic Republic of Iran." Separately, the U.S. Department of the Treasury would issue waivers for the export of Iranian crude oil, petroleum products, and derivatives immediately upon signing. On the nuclear side, Iran affirms it "shall not procure or develop nuclear weapons" and the two sides "have agreed to resolve the disposition of stockpiled enriched material," though the mechanism for doing so remains to be negotiated. The MOU also states the U.S. "undertakes to make fully available for use the frozen or restricted funds and assets" of Iran, potentially including approximately $100 billion in frozen assets, with relief contingent on future Iranian compliance.

The central legal question involves the Iran Nuclear Agreement Review Act of 2015 (INARA), Pub. L. 114-17. INARA, which passed the Senate by a 99-1 vote in 2015, requires the president to submit any "agreement with Iran relating to the nuclear program of Iran" for congressional review, including a potential vote in each chamber on a joint resolution of disapproval. Under the statute, the president must transmit the agreement, all related materials and annexes, a verification assessment report from the Secretary of State, and a presidential certification no later than five calendar days after reaching any such agreement. INARA then provides a 30-day congressional review period during which Congress may pass a joint resolution of disapproval stating it "does not favor the agreement." Because the MOU reportedly requires Iran to "maintain the status quo on its nuclear program," that provision may explicitly bring Iran's nuclear program within the MOU's scope, thereby triggering the submission requirement. President Trump indicated he would submit the MOU to Congress, but as of the publication of this brief, no submission had been made and no member of Congress had received the text [POLITICO].

House Democrats on the relevant oversight committees moved quickly. The ranking members of the House Foreign Affairs, Intelligence, and Armed Services committees, Reps. Gregory Meeks (D-N.Y.), Jim Himes (D-Conn.), and Adam Smith (D-Wash.), sent a letter to Secretary of State Marco Rubio demanding an immediate classified briefing, the full text of the MOU, and any related side arrangements [POLITICO]. The lawmakers cited INARA's submission requirement directly, asking when the administration would comply with the statute [POLITICO]. Rubio himself testified before Congress last year that "Congress has a right to weigh in on any deal and could actually reverse any deal," a statement that may complicate any executive argument that INARA does not apply to the MOU.

Republican reaction was divided. Sen. Bill Cassidy (R-La.), who is not seeking reelection, issued the sharpest condemnation among his party, calling the framework "the worst foreign policy blunder in decades" and arguing that Iran's nuclear ambitions remained unconstrained [POLITICO]. Sen. Lindsey Graham (R-S.C.), who had previously urged President Trump to restart hostilities during the ceasefire, struck a notably different tone. After a lengthy discussion with Special Envoy Steve Witkoff, Graham wrote on social media that it was his "opinion that signing the MOU will be beneficial to the United States, in as much as the Strait of Hormuz will begin to open, and the hostilities with Iran will stop." Graham added that whether the U.S. could reach an "acceptable, verifiable deal" on nuclear and other issues remained to be determined, but that he saw "little downside to trying." The Republican chairs of the Senate Armed Services, Senate Foreign Relations, and Senate Intelligence committees did not respond to requests for comment [POLITICO].

The MOU sits within a longer negotiating arc that began in April 2025. The first round of high-level meetings was held in Oman on April 12, 2025, led by Witkoff and Iranian Foreign Minister Abbas Araghchi. U.S. and Israeli forces launched large-scale strikes on Iran in February 2026, and the two sides announced a temporary ceasefire in April 2026. The MOU represents the first formalized framework to emerge from the post-ceasefire talks. The agreement is an initial framework, not a final peace agreement, and sets out a 60-day period during which further talks are expected to address unresolved issues, including Iran's nuclear program, particularly uranium enrichment levels and highly enriched uranium stockpiles. At the G7 summit, Trump stated that the denuclearization commitment should be permanent, and indicated military action would follow if it was not [POLITICO]. Iran's Tasnim news agency cited an unnamed official as saying that portions of the text published by at least one outlet were inaccurate, without specifying what differed, a discrepancy that underscores the verification challenges INARA's congressional review process was designed to address.