Senate for first time approves a war powers resolution in a rebuke to Trump over Iran conflict

The Senate approved a war powers resolution on Tuesday that seeks to limit President Donald Trump’s ability to use unauthorized military force against Iran, handing the White House a symbolic but historic rebuke in a 50-48 vote.

The result marked the first time the Senate has passed a war powers resolution on the Iran conflict, according to AP. It also created a bipartisan record of opposition to the administration’s handling of the issue, even though the measure is not binding on the president.

Four Republicans joined Democrats in backing the resolution: Susan Collins of Maine, Lisa Murkowski of Alaska, Bill Cassidy of Louisiana and Rand Paul of Kentucky. Sen. John Fetterman of Pennsylvania was the lone Democrat reported to vote against it.

Trump dismissed the vote on Truth Social, calling it "poorly timed and meaningless," AP reported. The White House has said the measure carries no legal force.

A historic Senate vote

The Senate’s action followed months of congressional frustration over U.S. military involvement related to Iran. Supporters framed the resolution as an assertion of Congress’s constitutional role in decisions about war and military force.

War powers resolutions are one of the tools lawmakers use to claim authority over military action. In this case, the Senate vote does not itself stop the administration, but it formalizes opposition inside Congress and adds to the political pressure on the White House.

The House had already approved the same resolution earlier in June, so both chambers have now passed the same measure. That makes the vote politically significant, but not enforceable law, because the resolution does not go to the president for signature.

What happens next

The immediate effect of the vote is limited, but the broader fight is not over. The administration can continue to argue that the resolution has no binding force, while lawmakers can use oversight, public pressure and future spending measures to push their position.

Further Senate or House action on related Iran war-powers measures remains possible. Officials and lawmakers are also likely to continue debating the legality and scope of presidential authority over military action.

The vote matters partly because of its timing. AP reported the Senate approved the measure on June 23, while later coverage from other outlets confirmed the same result into June 24, underscoring that the chamber’s action landed as the latest and clearest congressional challenge so far.

For now, the resolution stands as a notable political marker: a bipartisan Senate majority asserting that Congress should have a say before the United States takes further unauthorized military action against Iran.