The Senate voted against a war powers resolution that would prohibit President Trump from taking further military action against Iran on a 47-52 party-line vote. The measure, which would have required the president to withdraw United States Armed Forces from hostilities within or against Iran unless explicitly authorized by a declaration of war or specific authorization for use of military force, failed as the fourth time Democrats have compelled such a vote since U.S. operations began in Iran on February 28.

The resolution was spearheaded by Democratic Senator Tammy Duckworth of Illinois, who stated at a news conference Tuesday: “We cannot let this chaos continue unchecked.” Duckworth, a former Black Hawk helicopter pilot, added: “As our troops continue to sacrifice whatever is asked of them, we senators need to do the absolute minimum required of us.” She characterized the Senate’s action as necessary to end what she called “Trump’s illegal war of choice.”

Senator Jim Justice (R-WV) was the only senator who did not cast a vote. While nearly all Republicans opposed the resolution, some have signaled they may shift their positions if military operations in Iran persist. Senator John Curtis (R-UT) wrote in an op-ed: “I will not support ongoing military action beyond a 60-day window without congressional approval.” He cited historical and constitutional grounds for his stance.

The failed vote marks the start of Democrats’ intensified efforts to pressure Congress into withdrawing U.S. forces from the Middle East conflict, with pledges to introduce similar resolutions in coming weeks. Senate Republicans face growing challenges as more members indicate they would not support continued military operations without a formal declaration of war or congressional authorization for use of force. The War Powers Act mandates that the president seek congressional approval after 60 days of hostilities, with an additional 30-day grace period.