Dutton looms, Turnbull support drops: poll

Support for a Malcolm Turnbull-led coalition is falling apart as speculation swirls around a possible leadership challenge by Home Affairs Minister Peter Dutton, a new poll reveals.

The coalition's primary vote has dropped from 39 to 33 in just a month, according to the latest Fairfax/Ipsos poll published on Sunday night.

Labor leads the coalition 55 per cent to 45 per cent on a two-party preferred basis.

The plunge comes as the Liberal Party struggles to achieve internal consensus on the National Energy Guarantee.

The public divide has lead to speculation Mr Dutton may make a move for the Liberal leadership with the support of conservative members.

The speculation gathered steam after a radio interview last week where Mr Dutton said further disagreements could lead to his resignation from cabinet.

He took to Twitter on Friday to "make very clear" that the prime minister had his support as did the policies of the government.