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Murkowski's Iran AUMF collapses after Hegseth Article 2 testimony

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Lisa Murkowski's bipartisan Authorization for Use of Military Force on Iran remained unfiled as of 13 May after Pete Hegseth testified under oath that Article 2 of the Constitution makes an AUMF unnecessary, removing the rationale for the only legislative vehicle she had built.

← Back to Riyadh names its next targets; Najran is hit Jump to analysis ↓

ConflictDeveloping

Key takeaway

Hegseth's Article 2 argument won the legal case and collapsed Murkowski's bipartisan war-authorisation bill in the same week.

Senator Lisa Murkowski's bipartisan Iran authorization for use of military force (AUMF), drafted alongside Senator Todd Young with a 9 May filing target, remained unfiled on 13 May . The AUMF had first stalled on 11 May without explanation ; its political rationale was then removed entirely by Secretary of Defense Pete Hegseth's testimony on 12 May .

Hegseth testified under oath that Article 2 of the Constitution already covers the Iran strikes and that a Congressional AUMF is "unnecessary" ¹ ². That argument collapsed the bipartisan vehicle Murkowski had spent weeks constructing. An AUMF exists to authorise what the executive has not yet claimed authority for; Hegseth's testimony placed the strikes firmly inside Article 2, making the AUMF a redundant instrument in executive-branch logic. An administration that argued itself out of the AUMF route simultaneously argued itself out of the legislative vehicle that would have imposed six limiting conditions on the war.

The causal chain is direct: Hegseth testimony on 12 May removed the AUMF's rationale; Murkowski's AUMF remained unfiled on 11 May and continued unfiled on 13 May ; Murkowski, left without a vehicle she had drafted, moved to the Democratic war-powers resolution instead. She did not invent the Democratic option on a whim; The Administration foreclosed her own option first.

Murkowski had also co-drafted the AUMF with Rand Paul ally Young and targeted a filing date that passed without action . With the AUMF stalled and WPR resolutions failing by one vote, Donald Trump faces no formal Congressional constraint on Iran operations through the 1 June WPR deadline . The war continues on Article 2 grounds, with no authorisation instrument filed and no limiting conditions codified.

Deep Analysis

In plain English

Senators can pass a law called an AUMF, an 'Authorization for Use of Military Force', to formally set conditions on how a war is fought. Senator Murkowski spent weeks writing one with conditions attached, such as requiring the president to report to Congress regularly. Then Defense Secretary Hegseth testified that the president already had all the authority he needed under the constitution. His testimony made the authorisation bill pointless. Murkowski shelved her bill, leaving Trump's Iran war running on Hegseth's Article 2 claim with no written Congressional conditions attached.

Deep Analysis

Root Causes

Hegseth's Article 2 testimony was not inadvertent; it was the logical endpoint of a 76-day pattern in which the administration ran the war entirely through verbal statements and Treasury-Commerce staff actions rather than presidential instruments.

An AUMF with six limiting conditions, including Murkowski's proposed congressional-notification requirements, would have imposed the first written constraint on executive war conduct since 28 February. The testimony foreclosed that constraint before it could be filed.

The causal chain is direct: Hegseth testifies Article 2 is sufficient; Murkowski's AUMF loses its rationale because the administration it was meant to authorise has argued it needs no authorisation; Murkowski moves to the Democratic war-powers resolution as the only remaining vehicle. The administration's legal position foreclosed its own moderate Republican off-ramp.

What could happen next?

Consequence
With the AUMF shelved and war-powers resolutions failing 49-50, Congress has no formal vehicle to impose limiting conditions on Operation Epic Fury through the 1 June WPR deadline, leaving the executive with full operational discretion.
Immediate · 0.85
Precedent
Hegseth's under-oath Article 2 testimony closes the moderate Republican legislative off-ramp: future bipartisan AUMF efforts face the same structural obstacle, since the executive has publicly argued it needs no authorisation at all.
Medium term · 0.71
Risk
An administration running an authorised-under-Article-2 blockade faces different coalition management pressures than one with a bipartisan AUMF: allied governments providing forces under NATO or coalition frameworks may require a written legal authority from Washington as a condition of continued participation.
Medium term · 0.62

Source Landscape

This story draws on mixed-leaning sources from United States and France

United States

France

LeftRight

Primary parallel: Obama's Libya operation, 2011. The Administration coined the phrase 'kinetic military action' to argue the strikes did not constitute 'hostilities' under the WPR, avoiding the AUMF requirement entirely. When the 60-day mark passed, The White House released a 38-page legal opinion arguing no authorisation was needed.

The operation ran 222 days without an AUMF. Congress never forced the issue. Hegseth's Article 2 argument in 2026 is structurally the same move: a legal theory deployed to pre-empt the legislative vehicle rather than work through it.

Counter-parallel: George W. Bush's 2001 and 2002 AUMFs inverted the pattern: Bush actively sought Congressional authorisation for Afghanistan and Iraq despite having Article 2 authority. Bush and Cheney calculated that bipartisan AUMFs, which passed 420-1 and 296-133 respectively, removed the wars as domestic political liabilities and gave the executive more freedom of action than unilateral Article 2 claims. Trump's 2026 calculation ran the opposite way.

Consensus view: Lawfare editor-at-large Jack Goldsmith and former Bush administration legal counsel John Bellinger III have both written that executive Article 2 war-powers claims, once made under oath, structurally close off the AUMF route: an administration that has publicly argued it needs no authorisation cannot simultaneously support a bill that authorises the war, because doing so would imply the prior position was wrong.

Counter-view: John Yoo at Berkeley Law and Heritage Foundation constitutional scholars argue Hegseth's testimony strengthens executive discretion: Article 2 claims give the president sole command authority, meaning an AUMF that adds limiting conditions would itself be constitutionally suspect as an encroachment on commander-in-chief powers. Yoo has written that Congress cannot use an authorisation bill to reduce the president's Article 2 authority below the constitutional floor.

Key tension: Whether the president's Article 2 authority can be voluntarily constrained by an AUMF the executive itself supports, or whether an Article 2 claim, once made, makes any limiting-conditions AUMF legally incoherent from the executive perspective.

Sources:Time·Euronews

Mentions:Lisa Murkowski →Pete Hegseth →Todd Young →US Senate →Murkowski's AUMF →AUMF →Iraq →Iran →Rand Paul →Donald Trump →War Powers Resolution →George W. Bush →Afghanistan →Libya →White House →Heritage Foundation →

First Reported In

Update #97 · Chips for Beijing, no paper for Iran

Time· 14 May 2026

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Causes and effects

Caused by

Hegseth: Article 2 covers Iran war

Hegseth's Article 2 testimony directly destroyed the political rationale for the AUMF Murkowski had built.

Occurred 12 May 2026

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Murkowski's Iran AUMF still unfiled as Senate returns

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 11 May 2026

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This Event

Murkowski's Iran AUMF collapses after Hegseth Article 2 testimony

Hegseth's Article 2 testimony destroyed the bipartisan AUMF route without replacing it with the administration clarity Murkowski sought, leaving Congress no formal vehicle to constrain or authorise the Iran war through the 1 June War Powers Resolution deadline.

Led to

House ties 212-212 on third Iran vote

Hegseth's Article 2 testimony removed the procedural rationale for an AUMF, leaving Murkowski's public endorsement without a viable filing path.

Occurred 14 May 2026

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Pentagon weighs Sledgehammer rename to reset WPR clock

Murkowski's AUMF staying unfiled post-Hegseth (ID:3289) left Sledgehammer as the only remaining administrative fallback on the WPR exposure

Occurred 12 May 2026

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Trump signed nothing on Iran across Day 80

Hegseth's Article 2 doctrine, cited under oath on 12 May, is the working rationale for the Murkowski AUMF remaining unfiled on Day 80.

Occurred 18 May 2026

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Different Perspectives

Turkiye

Erdogan followed the Pakistani delegation to Jeddah for an instrument that has not been signed. Ankara's entry widens Saudi Arabia's defence architecture beyond the existing Pakistan pact, adding a second non-Gulf military partner mid-conflict.

Oman

Muscat is the corridor's broker but has published nothing about the arrangement Fars describes on its behalf. The account leaves Oman administering outbound traffic only, a narrower role than the shared route its mediation has rested on since 1979.

Pakistan

Islamabad sent Sharif, Munir and Dar to Jeddah to widen a defence commitment it has honoured in cheaper registers since March, when Dar invoked the Saudi mutual defence pact. Jeddah tests whether that hedge becomes a binding trilateral instrument with Turkiye.

United States

Washington rejected the Majlis Hormuz bill outright while CENTCOM's own tally kept climbing to 49 vessels redirected since 14 July. Both instruments tightened in the same week Trump promised the strait would reopen soon.

Iran

Iran's foreign ministry is selling a phased Hormuz corridor through Oman and denying any percentage cargo tariff, while its own Majlis is legislating fines to 20% and a bar on Israeli-linked cargo. The two accounts, from the same government, do not agree with each other.

Saudi Arabia

Riyadh published a target forecast, not an attribution, for the campaign it says the Najran strike previewed. That keeps an Article 51 case available while it formalises a trilateral defence architecture with Pakistan and Turkiye.