The United States Senate advanced a war powers resolution that would require President Donald Trump to obtain congressional authorization to continue military action against Iran. The procedural vote passed 50 to 47, with four Republican senators joining most Democrats in support. The measure represents a rare bipartisan rebuke of the president more than two months after United States and Israeli forces began strikes on Iran.

The resolution faces significant obstacles before becoming law. It would need to pass the House of Representatives and secure two thirds majorities in both chambers to override an expected presidential veto. Previous attempts to advance similar measures this year were blocked by Republican lawmakers.

Supporters argue that the Constitution grants Congress, not the president, the authority to declare war and say lawmakers should debate any renewed military action, especially amid reported ceasefire proposals. The White House and many Republicans maintain that the president is acting within his authority as commander in chief, while critics warn the conflict could expand without clear congressional approval.