John Curtis is the Republican US Senator for Utah, elected to the Senate in November 2024 after serving in the House of Representatives from 2017. As of 25 April 2026, he became the third named Republican backer of Senator Lisa Murkowski's draft Iran AUMF (Authorisation for Use of Military Force), joining Senators Susan Collins of Maine and Thom Tillis of North Carolina. Curtis has not publicly explained his position in detail, but his backing is significant: he represents moderate Republican opinion on foreign military intervention and sits on the Senate Foreign Relations Committee, giving him a formal role in AUMF deliberations.

On 27 April, Murkowski targeted Tuesday 28 April to formally introduce the AUMF, one day before the War Powers Resolution 60-day deadline on 1 May 2026. If introduced as filed text, the AUMF would be the first signed Iran congressional instrument of the war — arriving from the Republican side rather than Democratic. The fifth War Powers Resolution had failed 46-51 on 22 April; the four-Republican bloc (adding Rand Paul's WPR support) is well short of the 60 votes needed for cloture but enough to signal the administration faces Republican dissent.

Curtis was elected in 2024 in a competitive primary, positioning him closer to moderate suburban Republicans than the MAGA base. His willingness to back an AUMF — which constrains presidential war authority — suggests the Utah moderate wing is less willing than the base to accept open-ended executive war-making past the 60-day constitutional clock.

Common Questions

Who is Senator John Curtis?

John Curtis is the Republican US Senator for Utah, elected in November 2024. He previously served in the House of Representatives from 2017 to 2024 and sits on the Senate Foreign Relations Committee, giving him a formal role in AUMF deliberations on the Iran war.Source: US Senate biographical records

What is Senator Curtis's position on the Iran war authorisation?

As of 25 April 2026, Curtis has emerged as one of the Republican voices signalling reservations about extending the Iran war beyond 60 days, six days before the War Powers Resolution Deadline. His position has not crystallised into formal AUMF opposition but signals he is not an automatic yes vote.Source: Lowdown Iran Conflict 2026, update 79

Will Senator Curtis vote for the Murkowski Iran AUMF?

Curtis has signalled reservations about extending the war beyond 60 days without resolving his concerns, but has not declared formal opposition to the Murkowski AUMF draft. As a moderate Republican on the Foreign Relations Committee, his vote is significant for whether the administration can assemble a working majority before the 1 May Deadline.Source: Lowdown Iran Conflict 2026, update 79

What is the War Powers Resolution deadline for the Iran war?

The War Powers Resolution requires congressional authorisation within 60 days of the commencement of hostilities. For the 2026 Iran conflict, that Deadline falls on 1 May 2026. Without AUMF passage, the President faces a legal requirement to withdraw forces — though enforcement mechanisms are contested.Source: War Powers Resolution of 1973

Who is John Curtis and what is his position on the Iran war?

John Curtis is the Republican Senator for Utah, elected November 2024. He became the third named Republican backer of Senator Murkowski's Iran AUMF on 25 April 2026, joining Collins and Tillis in pushing for congressional authorisation of the war ahead of the 1 May War Powers Deadline.Source: event

What is an AUMF and why does it matter for the Iran war?

An AUMF (Authorisation for Use of Military Force) is the congressional instrument by which Congress authorises a president to use armed force. The Iran war has had no AUMF across 60+ days; Murkowski's draft, backed by Curtis, Collins, and Tillis, would be the first signed Iran congressional instrument of the conflict.Source: event

Source Material

Senator John Curtis official site

How the World Sees Them

Democratic caucus

Democrats have pushed five War Powers Resolutions; Republican AUMF backing shifts the dynamic — an AUMF could give Trump congressional cover rather than a constraint, depending on the text.

Trump administration

The White House has argued the war is 'winding down' and needs no AUMF. Four Republicans publicly willing to vote against that framing creates political pressure even if cloture is unreachable.

Republican leadership

Curtis's backing adds a Senate Foreign Relations Committee member to the AUMF coalition, giving it procedural credibility beyond a protest vote.