A public opinion survey by Ipsos and the Reuters has found that just one in three Americans support the war on Iran, with most respondents saying Trump has failed to explain his goals.

The agency said the figure marked the lowest rating in a Reuters/ Ipsos poll since the early days of the conflict. The survey was conducted on July 24-26.

It said Trump’s approval was at 37 per cent, up three points from last month when his rating tied the lowest of his presidency.