Most Americans say the US-Israel war on Iran has not been worth fighting, according to a new poll conducted by The Associated Press (AP) news agency and nonpartisan research organisation NORC, Al Jazeera reports.

Roughly two-thirds of US adults said the war has not been worthwhile, a figure that includes the vast majority of Democrats and independents and about 37 per cent of Republicans, the AP reports.

The poll was conducted July 23-27, during a brief pause in fighting after a nearly two-week escalation.

Trump’s approval rating, meanwhile, is about 33pc, slightly below where he stood at this point in his first term.