The US president’s profound ignorance of his enemy has led to an impotent cycle of empty threats, analysts say

Being the subject of mockery may be the most intense of all Donald Trump’s known aversions.

Yet more than five months after embarking on a war of choice against Iran, the US president risks attracting ridicule as he struggles to secure a military victory – while repeatedly threatening devastating bombardment against the Tehran regime, only to back down on the pretext of renewed negotiations.

Critics suggest the ultimatum-climbdown sequence has acquired a Groundhog Day quality. By one count, he has adopted the same tactic seven times since launching the war in tandem with Israel on 28 February.

Last weekend saw the latest episode, as Trump told reporters onboard Air Force One that he had suddenly called off “a massive” attack that he said would have been “the biggest since world war two” after an appeal from US allies and because “I think there’s a deal”.