The U.S. Senate on Wednesday rejected a Democratic resolution that sought to invoke the War Powers Act to halt President Trump's military campaign against Iran, with Republicans successfully blocking the measure from advancing. The resolution failed by a narrow margin, underscoring the slim but sufficient majority Republicans hold to keep the administration's Iran policy intact.

The War Powers Resolution, passed in 1973, requires the president to notify Congress within 48 hours of committing armed forces to military action and limits unauthorized engagements to 60 days without congressional approval. Democrats argued the administration had exceeded its authority and that Congress must reassert its constitutional role in matters of war. Republicans countered that the president retains broad authority as commander in chief to respond to threats and that the resolution would dangerously hamstring ongoing operations.

The vote was notably close, with reports indicating the outcome hinged on just five votes, reflecting divisions not only between the parties but potentially within them. The narrow margin suggests that at least some members from across the aisle were considering crossing party lines, though ultimately not enough to change the outcome.

The conflict with Iran has raised urgent questions about the scope and legal basis for U.S. military action. Critics in Congress have called for greater transparency from the administration about its objectives, timeline, and legal justification for the campaign. Supporters of the administration's approach argue that robust executive action is necessary given the security threats posed by Iran.

The failed resolution leaves the Trump administration with continued operational latitude to conduct its Iran campaign, at least in the near term. Congressional Democrats have signaled they may pursue additional legislative avenues to constrain the military action, while the administration has maintained that it is acting within its legal authority.