The timing of a push to unseat Financial Services Minister Kelly O'Dwyer, just 10 days after she gave birth to her second child, is incidental, according to the man leading the campaign.

Key points: Barrister Jack Hammond leading campaign to have Liberal Minister Kelly O'Dwyer replaced

Barrister Jack Hammond leading campaign to have Liberal Minister Kelly O'Dwyer replaced Mr Hammond set up the Save Our Super group and is angry at the Government's changes to super which passed in November

Mr Hammond set up the Save Our Super group and is angry at the Government's changes to super which passed in November Peta Credlin denies she is a potential replacement for Ms O'Dwyer

Ms O'Dwyer, the minister responsible for superannuation and one of five women in Malcolm Turnbull's Cabinet, is being targeted by a group of rich and powerful constituents still furious at the Government's changes to super.

"I'd be quite happy to see Kelly O'Dwyer replaced by another Liberal member," Jack Hammond QC said.

"Kelly O'Dwyer, in my view … by being involved in the creation and supporting the current policy of the Government, doesn't deserve to be our local member."

The Government has argued that only the rich will be affected by the superannuation changes which, with Labor's support, passed Parliament last November, including a 15 per cent tax on earnings for super nest eggs worth more than $1.6 million.

Barrister Jack Hammond says Kelly O'Dwyer "doesn't deserve to be our local member". ( ABC News )

The changes angered Mr Hammond, a barrister who lives in Ms O'Dwyer's leafy Melbourne suburban seat of Higgins. He set up the Save Our Super group.

He said the timing of the renewed push against the superannuation changes was incidental to Ms O'Dwyer being on maternity leave.

"It's a complete, if you pardon the pun, misconception. It's got nothing to do with her being on maternity leave or otherwise," Mr Hammond said.

"They gave birth to an appalling policy which is affecting thousands of Australians, not only now but in the future. They're the people who they should be thinking about."

'They're crucifying hundreds of thousands of people'

John McMurrick, a former insurance broker and now property developer who lives in Higgins, quit as a Liberal Party member last year in protest at the changes.

He also resigned from the Higgins 200 club, a party fundraising organisation.

"It's very unfair, it affects a lot of people," Mr McMurrick said.

"Our main concern is we did everything according to legislation, they encouraged us to do it, and then they backpedalled on it.

"It is retrospective legislation and they're not only crucifying people who've made a bob, they're crucifying hundreds of thousands of other people."

Credlin suggested as replacement

Peta Credlin was suggested as a replacement for Kelly O'Dwyer. ( AAP: Lukas Coch )

The push to unseat Ms O'Dwyer got new potency when Tony Abbott's former chief of staff Peta Credlin was reported on the weekend as a potential replacement.

"She speaks very plainly, she's a very intelligent person, and thus far she hasn't broken any promises to this electorate and the Australian people," Mr Hammond said of Ms Credlin.

Ms Credlin, no ally of Ms O'Dwyer, was slow to dispel the story, saying at first that she had not been "formally approached" to run in Higgins.

But on Sunday, Ms Credlin said the suggestion was "categorically false".

"Regardless of whether its Kelly O'Dwyer or anyone else, I don't think challenging sitting members is a good look — it's certainly not something that is rewarded in the Liberal Party," she told Sky News.

Disquiet in Victorian Liberal Party

Liberal insiders say the agitation in Higgins is symbolic of broader disquiet inside the Victorian Liberal Party division, which has been split over the style of Victorian party president Michael Kroger.

"The situation here in Victoria is that Michael Kroger is a very controversial figure," Stephen Mayne, a one-time Liberal staffer, said.

Michael Kroger is president of the Victorian Liberal Party. ( ABC News )

"There was a failed coup against him recently involving Peter Reith as an alternative candidate, which was backed by all the old Peter Costello supporters, like Kelly O'Dwyer, and it was also backed by the Victorian state leader Mathew Guy.

"Kroger doesn't like Kelly O'Dwyer, so there's a little bit of a feeling that there might be some Kroger involvement here, and of course the old [Tony] Abbott-Peta Credlin forces also don't like Kelly O'Dwyer, so that may be at play as well."

Mr Kroger said he would not comment on party preselections.

"That's a matter for branch members. We had this trouble recently in the Victorian party where various MPs were commenting on the presidency. That goes extremely badly with branch members," Mr Kroger told Sky News.

A former Howard government minister, Mr Reith suffered a stroke in late March, forcing his withdrawal from the presidential race.

Potential new challenges

Liberal insiders say there is a real prospect of tit-for-tat preselection challenges between the conservative and moderate wings of the Liberal Party — and not just in Victoria.

Mr Abbott is facing a possible challenge in his Sydney seat of Warringah and the former Prime Minister's staunch ally Kevin Andrews will likely face a fight for his safe Victorian seat of Menzies, ironically once touted as a seat fit for Ms Credlin.

"I think that the suggestion that Kelly O'Dwyer might be challenged by Tony Abbott's former chief of staff, Peter Credlin, might have broader implications which goes like this: that if someone's going to challenge Tony Abbott's preselection in Warringah, then there might be a whole bunch of counter challenges against Turnbull supporters," Mr Mayne said.