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Iran Conflict 2026
25MAY

Murkowski's Iran AUMF still unfiled as Senate returns

4 min read
13:55UTC

Lisa Murkowski had not filed her Iran AUMF as the US Senate returned on Monday 11 May; her self-imposed 9 May deadline for a White House 'credible plan' passed without action.

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Key takeaway

Murkowski's Iran AUMF stayed off the order paper as the Senate returned and her 9 May deadline passed unmet.

Lisa Murkowski, the Republican senator from Alaska, had not filed her Iran Authorization for Use of Military Force (AUMF) as the US Senate returned on Monday 11 May 2026. Her self-imposed conditional window, which required the White House to present a "credible plan" before she would file, expired on Saturday 9 May without an AUMF being filed . Todd Young, the Republican senator from Indiana who became the fourth GOP co-sponsor of the Murkowski bill on 3 May , remained on the text as Senate floor proceedings resumed.

Murkowski had confirmed on 3 May that she intended an 11 May Senate floor filing, which made today the named target date for the most plausible Republican-led war-powers instrument on Iran. The deadline passed two days before the Senate returned, which is the inversion of a normal pre-recess legislative cadence: the deadline-driving rhetoric usually escalates as the floor week approaches, and here it has gone quiet. Without a filed text on the order paper, the Senate's Iran posture for the week reverts to the position the White House has held for 73 consecutive days, which is no signed executive instrument and no congressional authorisation.

The substantive constraint on Murkowski is the absence of the "credible plan" she demanded. The White House did not produce one before 9 May, the Truth Social rejection of Iran's MOU reply replaced any plan with a rhetorical instrument, and Murkowski's filing condition has therefore not been met by any reading of her own published wording. The senator has not commented on the missed deadline; her co-sponsors have not commented either. For Senate observers, the live question is whether Todd Young or any of the other Republican co-sponsors hold the line if Murkowski does not file this week, or whether the bill quietly dies in the gap between a White House that will not produce a plan and an author who will not file without one.

The AUMF would have been the first formal congressional war-powers instrument on Iran in twenty-three years. Its non-filing leaves the executive branch as the only actor capable of authorising kinetic escalation, which is the constitutional question the AUMF was drafted to test, and it leaves the Senate without an instrument to caucus around when Brent above $104 and the multi-state Iranian strike morning return as policy pressure points later in the week.

Deep Analysis

In plain English

An Authorization for Use of Military Force (AUMF) is a law that Congress passes to formally approve a president sending troops into combat. The US Constitution gives Congress the power to declare war; AUMFs are the modern substitute, used since the 1973 War Powers Act to set limits on how long and under what conditions military operations can run. Senator Lisa Murkowski, a Republican from Alaska, drafted an Iran AUMF with four conditions the White House had to meet: clear military objectives, measurable goals, advance warning if the mission changes, and a plan for ending it. She said she would file the bill when the Senate returned on 11 May, unless the White House provided a credible strategy within seven days. The White House produced nothing. The bill was not filed. The war continues without Congress having formally authorised it, now into its 73rd day.

Deep Analysis
Root Causes

Murkowski's hold-versus-file calculation has three structural drivers that operate independently of her stated rationale.

First, the Republican caucus arithmetic. Todd Young's continued co-sponsorship confirms at least four Republican senators are publicly aligned with the AUMF concept . But no Republican senator who backed a War Powers challenge has faced a primary challenge from the party's Trump-aligned base and survived; Susan Collins (R-ME) is the outlier case, and Collins represents a state with a Democratic registration majority.

Murkowski won her 2010 Senate seat as a write-in candidate, the only senator since Strom Thurmond in 1954 to do so, giving her unusual primary-immunity. Filing an AUMF that constrains Trump's war authority therefore costs Murkowski less politically than it would cost any other Republican senator, which is the structural reason she holds the leverage rather than Young or Collins.

Second, Trump's 73-day pattern of zero signed Iran executive instruments means the White House has no credible plan document to deliver. The executive branch cannot produce a strategy document that constrains its own discretion without making that constraint legible to both Congress and Iran's negotiators. Murkowski's 'credible plan' demand is structurally unanswerable by an administration that has prosecuted a war entirely through verbal and social-media instruments.

Third, the AUMF's post-filing dynamic changes the negotiating environment with Iran. A filed AUMF signals that Congress has authorised the conflict, which strengthens Trump's hand in MOU talks by demonstrating domestic legal consolidation. Murkowski's leverage exists only while the bill is unfiled; filing converts it from a threat into a governing instrument.

What could happen next?
  • Consequence

    Murkowski's non-filing extends the constitutional vacuum in which Trump prosecutes the Iran war without explicit congressional authorisation into at least its 73rd day; the War Powers Resolution's 60-day clock expired on 29 April, leaving no domestic legal instrument defining the mission's scope or duration.

    Immediate · 0.91
  • Risk

    Todd Young's continued co-sponsorship keeps the four-senator Republican bloc intact, but each additional week without filing reduces the bill's leverage: an AUMF filed after a ceasefire would retroactively authorise completed hostilities rather than constrain ongoing ones.

    Short term · 0.78
  • Precedent

    The 2002 Iraq AUMF, which Bob Graham's analogous conditions failed to constrain in October 2002, was never repealed and remains live authority in 2026; an Iran AUMF without binding sunset or geographic limitations would create a comparable open-ended instrument.

    Long term · 0.83
  • Opportunity

    Iran's negotiators in the Islamabad channel can use the absence of a filed AUMF as evidence that Trump's domestic legal position is weaker than his social-media posture suggests, giving Tehran a structural reason to hold rather than concede in MOU talks.

    Short term · 0.72
Sources:ABC News
Mentions:Lisa Murkowski →Todd Young →US Senate →White House →Truth Social →AUMF →Iraq →Iran →Senate Intelligence Committee →Yemen →Murkowski's AUMF →Brent Crude →War Powers Resolution →
First Reported In

Update #94 · Tehran writes, Trump tweets, Brent breaks

ABC News· 11 May 2026
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Causes and effects
Caused by
Murkowski's Iran AUMF still unfiled before recess
ID:3165 confirmed Murkowski had not filed as of 8-9 May; this event records the expiry of her 30 April conditional window and the Senate's return on 11 May without an AUMF filed.
Occurred 9 May 2026
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This Event
Murkowski's Iran AUMF still unfiled as Senate returns
The bipartisan war-powers instrument the Senate floor had been pencilled to receive on 11 May is not on the order paper.
Led to
Hegseth: Article 2 covers Iran war
Murkowski's unfiled AUMF threat created the political context for Hegseth's Article 2 testimony, which formally closed the AUMF question
Occurred 12 May 2026
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Murkowski holds AUMF for a paper plan
Murkowski's AUMF remained unfiled as the Senate returned 11 May, extending the pattern documented in ID:3210
Occurred 11 May 2026
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Murkowski's Iran AUMF collapses after Hegseth Article 2 testimony
Murkowski's AUMF had already been unfiled on 11 May; the 13 May status is a continuation of the stall that preceded the vote.
Occurred 13 May 2026
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