WASHINGTON, July 23 (Reuters) - The U.S. Senate on Thursday blocked a Democratic-led resolution aiming to stop the Iran war until hostilities are authorized by Congress. The resolution reflects growing congressional concern, even among President Donald Trump's Republicans, over the war.The Senate voted 49 to 47 not to advance the war powers resolution. (Reporting by Patricia Zengerle; Editing by Don Durfee)

The Senate was also expected to vote on War Powers resolution, in largely symbolic move attempting to reign in Trump.

The Republican-led US House of Representatives backed a resolution on Thursday directing President Donald Trump to halt US military action against Iran