Senate Republicans Reject Bid to Limit Trump’s Iran War Powers

Senate Republicans on Wednesday rejected a Democratic effort to force President Donald Trump to seek congressional approval before continuing military action in Iran, another sign that lawmakers are struggling to reassert control once a war is already underway. The resolution, sponsored by Sen. Tammy Duckworth of Illinois, failed 47-52. Sen. Rand Paul of Kentucky was the only Republican to support it, Sen. John Fetterman of Pennsylvania was the only Democrat or independent to oppose it, and Sen. Jim Justice of West Virginia missed the vote.

The measure would have directed Trump to remove U.S. forces from hostilities in or against Iran unless Congress explicitly authorized the action. It was the fourth time Senate Democrats had forced a vote on the issue since the war began on Feb. 28, 2026, and it exposed the same problem that has shadowed war powers fights for years: once a president has ordered strikes, Congress can argue, protest and vote, but stopping the operation becomes far harder.

That dynamic has made the Senate a stage for repeated rebukes that do not change the course of the war. A similar Iran war powers effort failed 53-47 in 2025, and the latest defeat showed that Republican unity still gives Trump enough support to keep acting without a fresh authorization from Congress. The War Powers Resolution of 1973 says presidents must seek approval for military action that lasts beyond 60 days, and several Republicans now say their patience could run out there. Sen. Thom Tillis of North Carolina said, “We’ve got to start answering questions,” while Sen. John Curtis of Utah said he would not support ongoing military action beyond that window without congressional approval. Sen. Lisa Murkowski of Alaska has also raised concerns and floated a limited-authorization alternative.

The political fight is unfolding against a rising human and financial toll. Senate Democrats said the war had left at least 13 people dead and nearly 300 U.S. service members injured, while about 5,000 Marines and roughly 3,000 soldiers were being deployed to the Middle East for possible ground combat. Democrats have warned that the conflict could cost taxpayers tens of billions of dollars, even as a Reuters/Ipsos poll found 27% of U.S. adults approved of the strikes and 43% disapproved.

Senate Minority Leader Chuck Schumer said Democrats would keep pressing the issue, declaring, “We will bring these resolutions to the floor every week.” The repeated defeats suggest that Congress can still force a vote, but it has far less power to restrain presidential war-making once the missiles are already in the air.