Republican lawmakers on Capitol Hill are demanding further details about a newly announced agreement between the United States and Iran, with several senators expressing caution and skepticism as they await formal briefings from the White House.
The agreement, announced by President Donald Trump on Sunday, is aimed at ending the conflict with Iran and is expected to be ceremonially signed in Geneva on Friday. The framework reportedly includes the reopening of the Strait of Hormuz, the lifting of a U.S. naval blockade in the region, and potential financial incentives for Tehran if it meets specific conditions.
However, lawmakers from both parties said many aspects of the agreement remain unclear.
Senate Majority Leader John Thune said members of Congress have received little information about the arrangement and are seeking answers on how compliance would be monitored and enforced.
Questions have also emerged over how the agreement addresses Iran’s nuclear programme, including oversight of enriched uranium stockpiles and verification mechanisms to ensure Tehran complies with its obligations.
According to senior U.S. officials, the memorandum of understanding includes the possibility of sanctions relief, the release of frozen Iranian assets and access to a proposed $300 billion reconstruction fund if Iran meets agreed benchmarks. The full document has not yet been made public.
Republican Senator Thom Tillis questioned the lack of transparency surrounding the deal, while Senator John Kennedy said any agreement with Tehran must include strict safeguards and independent inspections.
Vice President JD Vance said the White House plans to release the text of the agreement this week and insisted that Iran would only receive financial benefits after fulfilling its commitments.
Congressional scrutiny is expected to intensify in the coming days. Under legislation enacted during the Obama administration, Congress has the authority to review agreements involving Iran’s nuclear activities, although lawmakers are not required to hold a vote.
Senator Lindsey Graham, a longtime advocate of a hardline approach toward Iran, said Congress should examine the final memorandum before making any judgment. He noted that descriptions of the deal from Washington and Tehran appear markedly different.
Several Republican senators indicated that Congress may eventually be asked to review or vote on the agreement if it evolves into a long-term arrangement.
Democrats also voiced concerns, questioning how the new agreement differs from the 2015 Iran nuclear deal negotiated under former President Barack Obama.
Senator Mark Warner argued that the previous agreement included broader international oversight and participation from major global powers, while Senator Elizabeth Warren questioned whether the costly conflict had produced meaningful gains for American citizens.
Senator Tim Kaine welcomed the prospect of ending hostilities but said lawmakers needed a clearer understanding of the agreement’s terms before reaching conclusions.
The debate comes as the Trump administration seeks to secure support for a deal it says could reshape U.S.-Iran relations and reduce tensions in a region critical to global energy supplies.
