The Senate rejected a motion to advance a joint resolution on Iran war powers Wednesday, but the 49-50 vote was the narrowest margin yet on the issue, and it came with a new Republican defection.

Senator Lisa Murkowski of Alaska voted yes on the discharge motion after opposing prior versions of the measure. She joined Senators Rand Paul of Kentucky and Susan Collins of Maine as the only Republicans siding with the Democratic majority on S.J.Res. 163, which would have directed the removal of U.S. Armed Forces from hostilities in or against Iran not authorized by Congress.

The motion still fell one vote short. Senator Pete Ricketts of Nebraska was listed as not voting. And Senator John Fetterman of Pennsylvania was the sole Democrat to vote no, preserving his break from his own party on the issue.

Murkowski said she had opposed every prior resolution because she believed an abrupt withdrawal would endanger American forces. Her shift came after the 60-day War Powers window passed without the administration providing the clarity she said she was looking for on the legal basis for continued operations.

The U.S. Senate roll call, recorded as Vote Number 118 at 11:29 a.m. on May 13, 2026, listed the question as a motion to discharge S.J.Res. 163:

Vote Number 118 was recorded at 11:29 a.m. on May 13, 2026. The question was the motion to discharge S.J.Res. 163, a joint resolution directing the removal of United States Armed Forces from hostilities within or against Iran that had not been authorized by Congress. The motion was rejected 49-50, with one senator not voting.

The cross-party lineup is what made the failed motion newsworthy. Three Republicans voted yea: Lisa Murkowski of Alaska, Susan Collins of Maine, and Rand Paul of Kentucky. Senator John Fetterman of Pennsylvania was the lone Democrat voting nay, while Senator Pete Ricketts of Nebraska did not vote. The tally shows a Republican conference still holding behind President Trump on the Senate floor, but with a small group now willing to force a more direct congressional role on Iran during a live foreign-policy confrontation.

The resolution, led by Senator Jeff Merkley of Oregon, would have required the president to withdraw forces from Iran hostilities unless Congress explicitly authorized the action through a declaration of war or a specific authorization for the use of military force. That language put the constitutional question front and center: does the current posture in and around Iran require congressional authorization, or does the administration already have the authority it needs?

The White House has argued that the War Powers clock stopped running on April 7, when a ceasefire was reached, because active hostilities had terminated. Some senators, Murkowski among them, pushed back on that framing. Defense Secretary Pete Hegseth told Murkowski the administration believes it retains all necessary Article II authority if the president decides to resume strikes. Murkowski reportedly responded that deployed troops and warships made it difficult to accept that hostilities had truly ended.

AP detailed the broader political dynamics around the vote:

The vote did not break President Trump’s support inside the Republican conference, but it did show movement. Murkowski joined Collins and Paul in voting with most Democrats on the Iran measure, while Fetterman remained the only Democrat on the other side. The legislation still failed to advance, yet the 49-50 result was close enough to put new attention on the Republican senators asking for a clearer congressional role before the next major Iran decision.

The broader War Powers fight turns on the administration’s position that hostilities with Iran had terminated after the April 7 ceasefire. Some senators argue that the continued military posture, including deployed troops and warships, still calls for Congress to weigh in. Defense Secretary Pete Hegseth told Murkowski the administration believes it has all necessary authority if President Trump decides to resume strikes. Republican leaders defended the president and argued the Democratic push would undercut him as he arrived in China for talks with Chinese President Xi Jinping, where Iran, trade, and Taiwan were already on the table.

That last point mattered for the timing. Republican leadership framed the vote as a political stunt designed to weaken the president on the world stage during sensitive diplomacy. It is a fair argument, and it clearly held most of the Republican conference together. But the fact remains that the yes side grew by one, and the margin shrank to a single vote.

CBS News added detail on Murkowski’s reasoning and the procedural stakes:

Murkowski had opposed earlier versions of the measure, but she changed position after the 60-day War Powers window passed and she did not receive the clarity she expected from the administration. The measure was led by Senator Jeff Merkley of Oregon and would have directed the president to remove U.S. forces from Iran hostilities unless Congress explicitly authorized the action through a declaration of war or a specific authorization for use of military force.

The procedural fight is tied to the War Powers Resolution of 1973, which requires the president to report to Congress after deploying forces without a declaration of war and limits unauthorized engagement to 60 days. The administration said the clock did not apply because the April 7 ceasefire ended active hostilities. The senators pushing the measure argued Congress still had a constitutional role to assert because the military posture around Iran had not fully disappeared, and because a future return to strikes would raise the same authority question immediately for lawmakers and the White House.

Merkley, for his part, was not shy about the result he wanted.

The broader picture here is not complicated. President Trump retains strong support from the Republican conference on Iran, and the administration’s legal position on the ceasefire and Article II authority has held up where it matters most: on the Senate floor. The measure failed again.

But a one-vote margin is a one-vote margin. Ricketts was absent. Murkowski moved. The constitutional pressure from the war powers wing of both parties is real, and it is getting louder. If the administration wants to keep this coalition together, particularly if the ceasefire frays or the military posture escalates, it will need to give senators like Murkowski something more persuasive than “we have the authority.” The votes are there to hold the line today. Whether they are there next month depends on what happens in the Persian Gulf and how seriously the White House takes the senators asking questions.

This is a Guest Post from our friends over at WLTReport. View the original article here.
 

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