The latest Newspoll says federal independents Tony Windsor and Rob Oakeshott would lose their seats if an election was held today.
Mr Oakeshott's primary support in Lyne has dropped from 47.1 per cent at the time of the election, to 26 per cent.
In New England, Mr Windsor's support has slumped from 61.9 per cent to 33 per cent.
The poll of just over 1,000 voters in the two New South Wales electorates was taken last week.
A majority of respondents also said they did not support the independents' decision to form a minority government with Labor last year.
Mr Windsor says he is not surprised by the poll results.
"I'm not all that disappointed with that result, particularly given that it's done by News Limited, you've got to put a bit of a codicil on that," he said.
"It [the poll] was done during the carbon tax, just after the carbon tax, and that fear campaign run by Tony Abbott and others."
Mr Abbott says Mr Windsor and Mr Oakeshott are paying a price for backing the carbon tax.
"People should listen to their electorates and I think that's the problem," the Opposition Leader said.
"I think that some of the independent members of parliament haven't been listening to their electorates, and if you don't listen to the electorate, you pay a price."