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• Four Republicans join Democrats in procedural vote against president’s stance on Iran

• Lawmakers cite Constitution giving Congress authority to declare war

WASHINGTON: The US Senate advanced a war-powers resolution on Tuesday that would end the Iran war unless President Donald Trump obtains Congress’ authorisation, a rare rebuke of the Republican leader 80 days after US and Israeli forces began striking Iran.

The vote on a procedural measure to advance the resolution was 50 to 47, as four of Trump’s fellow Republicans voted with every Democrat but one in favour. Three Republicans missed the vote.