US Congress passes resolution to restrict Trump's Iran military action

The US Senate on Tuesday passed a war powers resolution on Iran, restricting President Donald Trump from launching further military operations in Iran without congressional approval.

The passage of the resolution marked the first time such a measure has cleared both chambers of Congress since the conflict began in February and signalled growing opposition to Trump's handling of the war.

The Iran War Powers Resolution passed in Senate by a vote of 50 to 48, with four Republicans joining most Senate Democrats in support of the measure. One Democrat voted against it.

The resolution "directs the President to remove US Armed Forces from hostilities within or against Iran unless a declaration of war or authorisation to use military force for such purpose has been enacted," according to a summary of the legislation published on the Congress website.

It also reaffirms Congress' constitutional authority to declare war and initiate military hostilities, with supporters arguing that the war against Iran amounted to an unauthorised "war of choice."