The US Senate voted on Tuesday to approve a resolution directing the president to withdraw American military forces from the conflict with Iran, marking a rare bipartisan rebuke of President Donald Trump and signaling continued congressional unease over US involvement in the war.
Get today's headlines by email 
The measure passed by a vote of 50-48, with four Republican senators joining Democrats in support. Republican senators Rand Paul, Susan Collins, Lisa Murkowski and Bill Cassidy voted in favor of the resolution, while Democratic Senator John Fetterman opposed it.
Bipartisan Support Emerges
Democrats have repeatedly pushed votes in both chambers of Congress aimed at limiting Trump's authority to engage in military action against Iran without congressional approval.
Their efforts have gradually attracted support from some Republicans, despite opposition from the White House. Trump has publicly criticized lawmakers backing the measures, arguing they undermine national interests.
The latest Senate vote reflects growing bipartisan concern over the scope of presidential war powers and the role Congress should play in decisions involving military action.
Resolution Carries No Legal Force
The resolution had already passed the House of Representatives earlier this month. However, because it is a concurrent resolution, it does not require the president's signature and does not have the force of law.
Some supporters contend the measure could still carry legal significance. A Democratic aide involved in the House effort previously argued that the resolution should be considered binding, although any attempt to enforce it would likely become a legal matter for the courts to resolve.
The vote represents the Senate's 10th consideration of an Iran war powers measure since the start of the year. A separate Senate-backed resolution advanced last month but has yet to receive a final vote as Democratic leaders work to secure sufficient support for passage.
House Vote Prompted Trump Criticism
The House approved the resolution by a 215-208 margin, with four Republicans joining Democrats.
Those lawmakers quickly drew criticism from Trump, who described them as "GRANDSTANDERS" and called their actions "unpatriotic" in a post on Truth Social following the vote.
The House and Senate measures form part of a broader effort by Congress to reassert its constitutional authority over decisions involving war and military deployments.
Debate Continues Despite Diplomatic Progress
Supporters of the resolution argue congressional oversight remains necessary even as Washington and Tehran pursue diplomatic engagement.
Democratic Senator Tim Kaine said lawmakers should make clear that any future escalation requires congressional involvement.
"If we're really in a period of maybe some stability here, let's not just allow it to start up again without Congress being involved in that decision," Kaine told reporters.
His comments reflect concerns among some lawmakers that military tensions with Iran could re-emerge despite ongoing negotiations and recent efforts to stabilize relations.
Join the discussion? 
Already a member? 
Adapted by ASEAN Now. Source 24 June 2026