Voters in two key marginal seats facing upcoming federal by-elections strongly support the Turnbull government's approach to asylum seekers and border protection.
An overwhelming majority of people surveyed in the seats of Longman in Queensland and Braddon in Tasmania agree refugees being held on Manus Island and Nauru should not be resettled in Australia.
Two-thirds of Longman voters and 60 per cent of those in Braddon are against bringing refugees held in offshore detention to Australia, according to the Sky News-ReachTel poll.
Home Affairs Minister Peter Dutton said the strong support levels should come as no surprise, given border protection was a big issue at the last election.
"People voted for Labor thinking that they would have the same policy on border protection as the coalition and that's just not the case," Mr Dutton told Sky News on Monday.
"We're now seeing the Labor Party in the midst of a civil war; there are positions taken for and against - mostly against - the policy of the government that has stopped the boats and got the kids out of detention."
Labor policy also dictates that asylum seekers who arrive by boat will never be resettled in Australia.
But opposition frontbencher Andrew Leigh said this did not mean people should be left to languish in offshore detention.
"The government should have been working with New Zealand in order to resettle people out of Manus Island and Nauru," Dr Leigh said.
"The government's had all its eggs in the American basket, rather than working with other countries to do resettlement."
There have been 267 refugees sent from Australia's offshore detention centres to the United States under a resettlement deal that includes up to 1250 places.
Mr Dutton talked down the prospects of taking up New Zealand's standing offer to resettle 150 refugees, given the country's unique visa-on-arrival travel arrangements with Australia.
"To take up the New Zealand offer now - and in my judgment - any time in the next couple of years would be a complete disaster," he said.
Support levels for bringing refugees to Australia are far more evenly split on a national level, with 45 per cent in favour and 47 per cent opposed.
Nationally, 60 per cent of voters back a 90-day limit on mandatory detention of asylum seekers.
The Labor party will debate asylum seekers at its national conference in December, with a draft party platform seeking to "ensure detention is for no longer than 90 days".