A bipartisan effort to require President Donald Trump to obtain congressional approval before continuing U.S. military action against Iran failed in the Senate on Wednesday, highlighting the reluctance of the Republican-controlled chamber to challenge the White House as the conflict widens. The measure was defeated 53-47, with most senators voting along party lines. Republican Rand Paul of Kentucky joined Democrats in backing the resolution, while Democratic Senator John Fetterman of Pennsylvania voted against it.
The resolution, championed by lawmakers seeking to reassert Congress’s constitutional role in decisions of war and peace, would have required the administration to secure legislative approval for further hostilities against Iran. Supporters argued that it was designed to prevent the United States from drifting into a broader war without explicit authorization from Congress.
The vote came as the Trump administration signaled that military operations could intensify. Reuters reported that Chairman of the Joint Chiefs of Staff Gen. Dan Caine said U.S. forces would begin “striking progressively deeper” into Iran, while Defense Secretary Pete Hegseth said Washington intended to expand its campaign as Iranian missile activity declined. Associated Press also reported that officials were not ruling out a conflict lasting weeks or even months, indicating that the administration is preparing for a more prolonged confrontation than Trump initially suggested.
Democrats accused Trump of sidelining Congress and offering shifting explanations for the war, while several Republicans argued that any attempt to restrict the commander-in-chief during active hostilities would send the wrong signal to Iran and to U.S. forces in the region. That split reflected a broader debate in Washington over whether Congress has ceded too much authority over military action to successive presidents.
The administration has maintained that it complied with the War Powers Resolution of 1973, which requires the president to notify Congress within 48 hours of military action and limits unauthorized hostilities unless lawmakers approve them within 60 days. ABC reported that Trump sent Congress a formal war-powers notification on Monday covering the initial strikes on Iran.
The failed Senate vote is unlikely to end the constitutional fight. A related House measure still faces steep odds, while the administration appears determined to press ahead with a campaign that is already expanding in scope and political consequence.
