In the south Sydney seat of Hughes, firebrand conservative MP Craig Kelly faces likely defeat at the hands of New South Wales Liberal Party vice-president Kent Johns, a former Labor mayor of the Sutherland Shire who defected to the Liberals.
The Sydney Morning Herald reports, Liberal number-crunchers said Mr Kelly was "done".
Mr Kelly acknowledged the situation and said he did not have permanent tenure on the seat.
"We're not hereditary peers. We all have to stand on our record," he told Fairfax Media. "I'm more than happy to stand on my work rate and my performances."
Senator Bernardi has told Andrew Bolt on Sky News Mr Kelly is a victim of toxic New South Wales factional politics.
To join the Australian Conservatives, click here.