The U.S. House of Representatives narrowly approved a resolution seeking to require congressional authorization for continued military action against Iran, while the Senate rejected a similar measure on the same day, underscoring divisions in Congress as the conflict continues.
The House passed the resolution by a 214-208 vote after four Republicans joined Democrats, while the Senate rejected its version by a 47-49 vote.
The measures are largely symbolic and do not carry the force of law, but supporters said they demonstrate increasing concern over the administration's handling of the conflict and Congress's constitutional authority over war.
The latest House vote followed an earlier congressional effort in June that also sought to require approval before additional military action against Iran.
Supporters argued that the renewed resolution reflects continued concern after fighting intensified following the collapse of a ceasefire earlier this month.
Representative Pramila Jayapal said the conflict has had "no clear mission, no strategy, no end goal."
Democrats maintained that Congress, rather than the president alone, should determine whether the United States remains engaged in the conflict.
The White House opposed the resolutions, stating that the president has constitutional authority to defend the United States and prevent Iran from obtaining a nuclear weapon.
Most Republicans voted against the measure, arguing that military operations remain necessary and supporting the administration's approach.
The war began after joint U.S. and Israeli airstrikes in late February before a temporary ceasefire was reached in April.
Hostilities resumed after the ceasefire broke down, with both sides exchanging attacks and lawmakers raising questions about the conflict's duration and objectives.
Several Democrats said Congress could pursue restrictions through future funding decisions if authorization measures continue to fail.
The House has already approved a defense spending package that includes additional funding related to the conflict, while the Senate has yet to vote on that legislation.
The votes also reflected growing political pressure as some lawmakers questioned the administration's long-term strategy and public polling indicated declining support for the war among Americans.