U.S. and Iran Sign Preliminary Peace Deal as Lebanon Conflict Threatens Truce

The United States and Iran have reached a preliminary agreement to end a three-and-a-half-month war that has destabilized the Middle East and choked global energy markets. The memorandum of understanding (MOU), brokered with the help of Pakistan and Qatar, was digitally signed by both nations on Sunday, with a formal in-person ceremony scheduled for Friday in Switzerland.[4][5]

The immediate consequence of the pact is the reopening of the Strait of Hormuz, a vital maritime chokepoint that handles nearly one-fifth of the world's oil supply. President Donald Trump announced the immediate lifting of the U.S. naval blockade, declaring that ships could "start your engines." Global markets reacted swiftly, with oil prices tumbling by $4 per barrel and U.S. equities rallying on the prospect of restored energy flows.[4][5]

Under the terms of the MOU, the U.S. will reportedly allow Iran to immediately resume selling oil and fuel, providing a critical lifeline to Tehran's battered economy. In exchange, the agreement establishes a 60-day window for the two nations to negotiate a comprehensive, long-term settlement regarding Iran's nuclear program and the permanent lifting of economic sanctions.[1][5][8]

President Trump has framed the agreement as a definitive victory, asserting that Iran has fully agreed to abandon its pursuit of a nuclear weapon under "strong policing powers." Speaking at the G7 summit in France, Trump emphasized that the primary goal of the conflict—preventing a nuclear-armed Iran—had been achieved, though the exact mechanisms for dismantling Tehran's nuclear infrastructure remain to be finalized in the upcoming talks.[1][3]

Despite the optimism from the White House, the agreement faces a severe stress test in Lebanon. The draft deal reportedly mandates an immediate and permanent termination of military operations across all fronts, which Tehran insists must include a withdrawal of Israeli forces from southern Lebanon.[2][7]

Israel, which was largely sidelined during the final stages of the U.S.-Iran negotiations, has forcefully rejected this condition. Prime Minister Benjamin Netanyahu stated that Israel is not bound by the agreement and that the Israel Defense Forces will remain in Lebanon, Gaza, and Syria "for as long as necessary" to ensure national security.[1][2]

This parallel conflict threatens to unravel the fragile U.S.-Iran truce before the ink is fully dry. Iranian Foreign Minister Abbas Araghchi warned that any continued Israeli strikes or military presence in Lebanon would constitute a direct violation of the U.S.-brokered deal. Hezbollah, the Iran-backed militant group, welcomed the comprehensive ceasefire but warned it would not accept any violations of Lebanese sovereignty.[1][2][8]

Back in Washington, the agreement is facing intense bipartisan scrutiny. Lawmakers have expressed frustration that the administration has not yet released the text of the MOU, leaving Congress largely in the dark about the specific concessions made to Tehran.[3][6]

Senate Majority Leader John Thune and other Republicans have pressed the White House for transparency, with some conservative critics labeling the unreleased pact a "surrender." Democratic leaders have similarly voiced skepticism, pointing to previous premature declarations of peace and demanding concrete proof that Iran's nuclear ambitions have been neutralized.[3][6]

The administration's maneuverability may be constrained by the Iran Nuclear Agreement Review Act (INARA) of 2015. The law requires the president to submit any nuclear agreement with Iran to Congress for review before sanctions can be permanently eased, opening the door for lawmakers to potentially block or complicate the deal's implementation. Trump indicated Tuesday that he is willing to send the interim deal to Congress for review after the formal signing.[3]

Foreign policy experts caution that while the MOU successfully pauses the immediate military confrontation, the 60-day timeline to resolve decades of entrenched disputes over uranium enrichment and sanctions relief is highly ambitious. The fundamental gap between Washington's demand for total nuclear dismantlement and Tehran's insistence on immediate economic relief remains the central hurdle.[5][8]

The diplomatic focus now shifts to the mountainside resort of Bürgenstock, Switzerland, where U.S. Vice President JD Vance and Iranian Parliament Speaker Mohammad-Bagher Ghalibaf are expected to formally sign the document on Friday. How the two sides navigate the explosive situation in Lebanon over the coming days will likely determine whether the Friday ceremony marks the end of a war or merely a brief pause in hostilities.[1][4][7]