Republicans block resolution to take up the measure, which Democrats vow to bring up ‘again and again and again’

Senate Republicans on Wednesday blocked a measure that aimed to rein in Donald Trump’s power to wage war against Iran without congressional authorization.

The 53-47 vote against taking up the measure fell almost completely along party lines, with no movement from earlier this month when Republicans blocked Democrats’ bid to limit Trump’s war-making power in the days after the joint US-Israeli strikes, known as Operation Epic Fury, began across Iran.

The senator Rand Paul of Kentucky, who has led several war-powers efforts, was the only Republican to vote in support of the measure, while the senator John Fetterman of Pennsylvania, who has emerged as a staunch supporter of Israel, was the only Democrat to break with his party and vote against the resolution.