The US House of Representatives on Wednesday passed a war powers resolution aimed at forcing President Donald Trump to withdraw US forces from hostilities against Iran, increasing political pressure on the president.
The resolution states that any military action would require a formal declaration of war or authorization by Congress. Operations necessary to defend the United States or an ally against imminent attacks would be exempt.
The measure passed by 215 votes to 208, with four lawmakers from Trump's Republican Party joining Democrats to help secure its approval.
The resolution has no immediate consequences for US policy towards Iran, but highlights growing political pressure on Trump, especially with midterm congressional elections due in five months.
A growing number of Republicans are now openly opposing Trump's war strategy.
A ceasefire is currently in place in the Iran war and negotiations are under way on a possible framework agreement to end the conflict. Even so, both sides have repeatedly exchanged attacks in recent days.
The House resolution still needs to be approved by the Senate, the other chamber of Congress. Even then, the president could veto a resolution passed by both chambers. Overriding such a veto would require a two-thirds majority, which is highly unlikely.
About two weeks ago, the US Senate voted for greater oversight of the war in Iran. The majority there was made possible by four Republicans who broke with their party's line.
