WASHINGTON — Republican voters appear to sour on a preliminary peace agreement with Iran as they learn more about its terms, according to a new poll shared exclusively with The Post.
At first, registered Republicans supported the deal by a wide margin, 62% to 20%, the survey from J.L. Partners found.
But support dropped sharply after respondents were given details of the memorandum of understanding signed by President Trump last week. Just 32% described it as a “good deal,” while 44% called it a “bad deal” and 15% said it was “neither.”
Voters were especially critical of elements of the MOU that would waive sanctions to permit the sale of Iranian crude oil, as well as a US commitment not to impose additional penalties during a 60-day negotiating window.
A majority of GOP voters, 57%, said they would be less likely to back the agreement after learning it would ease sanctions without requiring Tehran to stop financing terrorist proxy groups in the Middle East or dismantle its nuclear and ballistic missile programs.
“If other countries have them, it’s a little bit unfair for them not to have some,” Trump told reporters at the G7 last week when asked about criticism of the agreement. “Am I going to let Saudi Arabia have missiles, but [Iran] can’t have them? It doesn’t work that way.”
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Nearly half of those surveyed, 48%, said they would be less inclined to support a peace deal that includes $300 billion in reconstruction funding for Iran — money Trump and Vice President JD Vance have said would partly go toward purchases of American agricultural goods.
The poll also found that 63% of Republican voters oppose any agreement unless Iran turns over its enriched uranium and dismantles its nuclear facilities.
Iran’s stockpile of nearly 1,000 pounds of highly enriched uranium is widely believed to be buried under rubble following US airstrikes on three nuclear sites in June 2025, and its fate is expected to be a sticking point in ongoing negotiations.
More than half (52%) also agreed that Israel should be allowed to attack Hezbollah in Lebanon even at the expense of a deal with Iran, while just 30% argued that reaching a deal to reopen the Strait of Hormuz should take priority.
Trump has repeatedly criticized Israel for its attacks in Lebanon, but recently put the onus back on Iran, warning he would hit Tehran “very hard” if it fails to rein in Hezbollah.
When asked who won the war, only 44% of GOP respondents felt that the US won, while 19% said Iran had gotten the better of the conflict and 31% concluded it was a tie or that neither country won, per the poll.
Republican voters were also split over which side had gotten the best of the deal, with 40% saying the US had “done better,” 36% saying Iran had won the peace and 24% saying they were unsure.
The J.L. Partners survey sampled 1,033 registered Republican voters June 19–21 with a margin of error of plus or minus 3 percentage points.
