US public approval of the war with Iran fell to its lowest level since the conflict's early days, helping to hold President Donald Trump's popularity at a record low, according to a Reuters/Ipsos poll that closed on Monday.
The four-day poll showed just 31% of Americans support US military action against Iran, down from 37% in a March Reuters/Ipsos poll and 34% earlier this month.
The decline was driven by fewer self-identified Republicans backing the conflict. Some 69% of Republican respondents support the war, compared with 77% in March.
Support for the conflict has remained below 40% since the US and Israel launched strikes on Iran on February 28.
A July Reuters/Ipsos poll also found that 69% of Americans believed Trump had not clearly explained the goals of US military involvement in Iran.
Support for Iran war falls as Trump approval remains at record low
The war has been dragging on Trump's public standing this year, and for the second survey in a row, just 33% of respondents said they approved of the Republican's performance in the White House, the lowest level in polls from Trump's first or second term.
Trump's approval had fallen to 33% in the previous Reuters/Ipsos poll, down from 35% earlier in August. That result tied the lowest approval rating recorded during his first term, reached in December 2017.
Some 83% of the country thinks the war will go on "for an extended period of time," the Reuters/Ipsos poll found, up from 80% earlier this month.
The poll surveyed 1,215 US adults nationwide and had a margin of error of 3 percentage points in either direction.