A Newspoll, conducted for The Australian, shows ­support for constitutional change has fallen to 38 per cent, while backing for the ‘no’ vote has risen to 53 per cent.

An October 14 referendum will ask Australians if they wish to recognise Indigenous people in the constitution as well as enshrine a proposed advisory body called the voice.

Consecutive polls have shown support for the voice has been sliding.

Success will require a majority of voters and a majority of states voting in favour.

Cabinet minister Tony Burke said he was confident the referendum would succeed.

“(Opposition Leader) Peter Dutton, I think, has underestimated the goodwill of a whole lot of Liberal voters here as well,” he told ABC radio on Monday.

“There’s a generosity in the Australian people and as people come closer to the date, focus their minds, look at the proposal, we see something where there’s nothing to lose and everything to gain.”

Mr Dutton has confirmed he would hold a second referendum solely to enshrine Indigenous recognition into the constitution if the voice fails to pass.

Defending the coalition’s failure to push for constitutional recognition in almost 10 years of government, Mr Dutton said Australia wasn’t previously ready for the issue.

“We’re going to spend about $450 million to pose a question on October 14 that he (Anthony Albanese) knows is going to fail,” he told Nine’s Today.

“I just don’t think he’s going to shift votes unless he gives the detail.”

Support for the ­coalition has lifted to its highest level since the 2022 election while support for the voice dropped following the ­referendum date announcement, according to the latest Newspoll.

The coalition leads Labor 37 per cent to 35 per cent on primary votes, although the ALP still holds a comfortable two-party preferred lead of 53 per cent to 47 per cent, according to the poll published in The Australian on Monday.

Meanwhile support for the Indigenous voice to parliament fell to 38 per cent, while those intending to vote ‘no’ at the referendum rose to 53 per cent and nine per cent were undecided.

Labor leader Anthony Albanese’s approval ratings suffered a fall with satisfaction in his performance dropping from 52 per cent in July to 46 per cent in the latest poll. His dissatisfaction rating rose six points to 47 per cent.

Opposition Leader Peter Dutton’s approval ratings saw those satisfied with him rising two points to 38 per cent, while those with a negative view stayed at 49 per cent.

In the preferred prime minister stakes, Mr Albanese suffered a four-point fall to 50 per cent with Mr Dutton lifting two points to 31 per cent, according to the poll of 1200 voters conducted between August 28 and September 1.