Trump's Iran Deal Meets Republican Skepticism on Capitol Hill

President Trump's freshly signed memorandum of understanding with Iran is running into a wall of cautious skepticism from his own party — the same Republicans who spent years savaging Barack Obama's 2015 nuclear deal are now being asked to accept a similarly opaque agreement with Tehran, and most are refusing to commit until they've actually seen the text.

The agreement, signed electronically by Trump, Vice President JD Vance, and Iranian Parliament Speaker Mohammad Bagher Ghalibaf, promises an immediate reopening of the Strait of Hormuz, an end to the US blockade, and a 60-day window to negotiate Iran's nuclear capability. But the details are murky enough that even senior Republicans are openly frustrated. Senate Armed Services Chair Roger Wicker of Mississippi is withholding judgment, Tom Cotton declined comment entirely, and Chuck Grassley — the Senate's most senior Republican — said he won't say anything until he reads it, which won't happen before Friday. Senate Majority Leader John Thune said he too was waiting for further briefings.

Key Republican concerns cluster around three issues: whether the deal actually constrains Iran's nuclear program, whether Iran will be allowed to charge tolls on Strait of Hormuz shipping, and whether Tehran will be forced to end its funding of terrorist proxies. Senator Joni Ernst of Iowa laid out exactly those conditions. Senator Rick Scott went further, saying he can't imagine supporting any arrangement that unlocks $300 billion in frozen Iranian assets — a figure the administration is pushing back on, insisting that any release of frozen funds or sanctions relief will be tied to Iranian 'performance,' with only small initial gestures exchanged on both sides.

The political backdrop adds pressure. The Iran conflict hit the formal 60-day congressional threshold, prompting four GOP senators to vote to advance a war powers resolution reining in Trump, and a similar measure passed the House with bipartisan support. Republicans were eager for the war to end quickly given the economic damage from spiking gas prices. Now that there's a ceasefire, there's palpable relief — but also recognition that a durable nuclear deal would almost certainly require a congressional vote, a process that consumed enormous political energy even for Obama with members of his own party. If the 60-day negotiating window produces a binding agreement, Trump will need to spend political capital he's been burning lately on other Senate fights.