Louisiana Senator Bill Cassidy joined three other Republican lawmakers in supporting the measure. Though symbolic and unlikely to become law, advancing the resolution is a sign of growing frustration with the war.

The Senate has advanced legislation that seeks to force President Donald Trump to withdraw from the Iran war.

The war with Iran has now blown past the 60-day requirement under the War Powers Act for the president to seek the authorization of Congress.

The bill had previously been shot down with a lack of Republican support, but Sen. Bill Cassidy's defection could be crucial.