Senate’s Seventh Iran War Powers Vote Fails 49-50, With Three GOP Defections

The Senate on Wednesday rejected, for the seventh time since the start of the U.S.-Iran war, a motion to discharge a War Powers Resolution from the Senate Foreign Relations Committee, falling short on a 49-50 vote. ^[1][2] Three Republican senators, Lisa Murkowski of Alaska, Susan Collins of Maine, and Rand Paul of Kentucky, crossed the aisle to support the measure, joining nearly all Senate Democrats. ^[3][6] Sen. John Fetterman, Democrat of Pennsylvania, again voted against the resolution, providing the margin that allowed Republican leadership to hold. ^[6][8] The vote was the highest-tally the resolution has achieved since the war began Feb. 28. ^[9]

The resolution, sponsored by Sen. Jeff Merkley of Oregon, would have directed the president to "remove the United States Armed Forces from hostilities within or against Iran, unless explicitly authorized by a declaration of war or a specific authorization for use of military force." ^[7] The procedural vehicle was a motion to discharge the measure from the Senate Foreign Relations Committee, chaired by Sen. Jim Risch of Idaho, who argued ahead of the vote that the hostilities referenced in the resolution "do not exist today and have not existed for some time." ^[7] That position tracks the Trump administration's formal posture: in a May 1 letter to congressional leaders, President Trump asserted that "hostilities" with Iran had "terminated," citing the ceasefire that took effect April 7. ^[7][15] The administration contends the ceasefire paused the War Powers Resolution's 60-day clock, a position Defense Secretary Pete Hegseth advanced during a Senate hearing the previous week. ^[13][15]

Wednesday's vote was the first since the expiration of that 60-day statutory window. ^[6] The War Powers Resolution of 1973, enacted in the aftermath of the Vietnam War, requires the president to notify Congress within 48 hours of introducing U.S. forces into hostilities and mandates withdrawal within 60 days absent a congressional declaration of war or authorization for use of military force. ^[7][17] The Trump administration notified Congress on March 2, placing the legal deadline at May 1 under the statute's terms. ^[16] Democrats and a number of legal scholars reject the administration's ceasefire-tolling theory, arguing the statute contains no provision allowing the clock to pause once triggered. ^[16] The administration has also argued, as prior presidents have, that the War Powers Resolution is itself unconstitutional as applied to executive war-making authority. ^[13][15]

Murkowski's vote marked her first support for any of the seven resolutions; she had previously abstained or voted against similar measures. ^[9] Collins voted for the resolution for the second time, having first broken with Republican leadership on April 30, the eve of the statutory deadline. ^[6] Paul has supported every such motion since the conflict began. ^[6] Murkowski told reporters ahead of the vote that the Senate is "in a different place than we were last time we voted on this," and has separately indicated plans to introduce a formal authorization for use of military force when the Senate returned from recess. ^[7][19] Senate Majority Leader John Thune of South Dakota urged colleagues to hold together ahead of the vote, noting that the president was then overseas engaged in trade negotiations with China, but acknowledged that senators "have their own minds about some of these issues." ^[7]

The narrowing margin reflects growing, if still insufficient, Republican unease. Sen. Tim Kaine of Virginia, who has led Democratic efforts on the issue, acknowledged before the vote that GOP movement has come "much more slowly" than Democrats had hoped, according to POLITICO. Kaine and Merkley have both argued that economic pressure, including rising energy costs tied to Iran's continued blockade of the Strait of Hormuz, may eventually shift enough Republican votes. ^[9] A Reuters/Ipsos poll released this week found that approximately two-thirds of U.S. voters said the administration has not clearly explained its rationale for the war. ^[9] Senate Majority Whip John Barrasso of Wyoming defended the administration's authority, stating that "only President Trump has had the courage and the strength" to enforce the longstanding U.S. policy against an Iranian nuclear weapon. ^[6]

Even if the resolution were to pass the Senate, its practical legal force is limited. The president could veto any concurrent war powers resolution, and federal courts have historically declined to adjudicate war-powers disputes on political-question and standing grounds. ^[3][20] Some Senate Democrats have begun discussing potential litigation if military operations continue without statutory authorization, though legal experts and prior caselaw counsel against optimism about judicial intervention. ^[20] The more consequential pressure point may be an anticipated White House request for supplemental war funding, which Senate Majority Leader Thune has flagged as a future "inflection point" where Congress holds genuine leverage. ^[8] That request has not yet been transmitted to the Hill, and cost estimates for the campaign have ranged into the hundreds of billions of dollars. ^[8]