The US Senate has advanced legislation seeking to limit President Donald Trump’s authority in the ongoing Iran conflict, signaling growing bipartisan concern over the war.
The measure passed in a 50-47 procedural vote after Republican Senator Bill Cassidy switched his position and backed the resolution following his recent primary election defeat in Louisiana.
The legislation would require Trump to either seek formal congressional approval for continued military operations against Iran or begin withdrawing US forces from the conflict.
Several Republican senators, including Lisa Murkowski, Susan Collins and Rand Paul, joined most Democrats in supporting the measure. Democratic Senator John Fetterman voted against it.
The vote reflects increasing political pressure surrounding the Iran war, which began after US-led strikes earlier this year and has continued despite recent ceasefire discussions and diplomatic efforts in the Middle East.
Multiple US media reports, including AP, said the growing Republican support highlights rising concerns over the long-term costs of the conflict, transparency from the White House and fears of deeper US involvement in the region.
Although the measure still faces major hurdles in the Republican-controlled House and could be vetoed by Trump, analysts say the Senate vote marks one of the strongest bipartisan challenges yet to the administration’s Iran strategy.