Tony Abbott needs to stop stirring dissent within the Liberals if they want to continue running the country, says new federal party president Nick Greiner.
The former NSW premier says the party will lose the next election if it doesn't present a unified face to the Australian public, which has watched a month of infighting led by the former prime minister.
"It is as simple and as stark as that," Mr Greiner warned on Sunday.
He told Sky News that while the government was talking about itself, Labor and Opposition Leader Bill Shorten were "totally escaping scrutiny".
He said he planned to talk to Mr Abbott, who has been particularly vocal about the direction of the government, in the next week or so.
"I think we have got to be adults about it," he said.
"I think everyone understands a prime minister who loses his position in the way it happened has all sorts of human emotions and has responded in a particular way which is very open and public."
However, he also conceded the infighting was an issue for the parliamentary party.