Three Republican Senators Break With GOP Leadership on Vote to Limit Iran War

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Three Republican senators broke ranks with party leadership Wednesday and sided with Democrats in support of a resolution aimed at limiting further U.S. military involvement in the conflict with Iran unless Congress formally authorizes additional action.

The measure, introduced under the War Powers Resolution, sought to require President Donald Trump to withdraw American armed forces from ongoing hostilities involving Iran without explicit approval from Congress.

Republican Senators Lisa Murkowski, Susan Collins, and Rand Paul joined nearly all Senate Democrats in backing the effort. Despite their support, the procedural vote failed narrowly by a margin of 49-50.

Senator John Fetterman was the only Democrat to oppose advancing the resolution, while Republican Senator Dan Sullivan voted with GOP leadership against the measure.

Several Republicans who had previously expressed concerns about congressional authority over military action nevertheless opposed the resolution, including John Curtis, Thom Tillis, Josh Hawley, and Todd Young.

The resolution’s Democratic sponsor, Jeff Merkley, sharply criticized the administration’s military campaign against Iran, arguing that the operation had failed to achieve key objectives and had instead intensified instability in the region.

Republican leaders strongly pushed back against the effort. Senate Majority Whip John Barrasso accused Democrats of undermining the president’s ability to prevent Iran from obtaining nuclear weapons and defend U.S. interests abroad.

The vote marked the Senate’s first major action on ending the Iran conflict since the expiration dispute surrounding the 60-day timeline established under the War Powers Act. Under the law, presidents may conduct military operations for a limited period without congressional authorization before lawmakers must approve continued involvement.

Democrats argued that the administration exceeded that legal window earlier this month. However, some Republicans contended that a temporary ceasefire between the United States and Iran effectively paused the clock and extended the president’s authority.

Supporters of the resolution rejected that interpretation, arguing that ongoing military pressure, naval operations, and regional attacks still constitute active hostilities despite the slowdown in direct bombing campaigns.

Tim Kaine said lawmakers cannot ignore continued military actions simply because large-scale airstrikes have temporarily stopped. He pointed to attacks near U.S. assets in the region and continued naval operations targeting Iranian ports as evidence that the conflict remains active.

Meanwhile, Senate Majority Leader John Thune urged Republicans to stay unified behind Trump, particularly while the president is engaged in sensitive international negotiations overseas.

The closely divided vote highlighted growing tension inside both parties over the future of U.S. involvement in the Middle East, as lawmakers continue debating how much authority presidents should have to wage military operations without direct congressional approval.