Home Affairs Minister Peter Dutton is staring down supposed "attacks" from people questioning his eligibility to remain in parliament, saying they only make him more determined.
Mr Dutton is facing continued questions about his personal financial stake in two publicly-funded Brisbane child care centres.
The connection could potentially put the minister in breach of the constitution, which bans from parliament anyone who has "any direct or indirect pecuniary interest with the public service of the Commonwealth".
Malcolm Turnbull raised the issue to prominence last week while attempting to head off a Liberal leadership mutiny from Mr Dutton.
Mr Turnbull demanded the solicitor-general produce legal advice on the issue before he would allow a second leadership spill.
The solicitor-general found there was "some risk" the High Court could find Mr Dutton had a conflict of interest over federal payments to the two childcare centres, which are overseen by a family trust.
The leadership spill eventually went ahead as planned, although Mr Dutton lost the contest to Scott Morrison.
Labor is maintaining pressure on Mr Dutton over the childcare centre issue, having fallen just one lower house vote short of referring him to the High Court.
But if Mr Dutton is concerned, he is certainly not showing it.
"If these people think that they're going to beat me down or somehow defeat me, they are completely and utterly wrong," he told 2GB radio on Thursday.
"It just makes me more determined to make sure that we fight for the things that are important."
Prime Minister Scott Morrison is not ruling out referring the Home Affairs minister to the High Court, but is confident in the government's legal advice.
"I have been consulting with the attorney-general, and we are dealing with those issues within our internal processes," Mr Morrison told reporters in Sydney on Wednesday.
"I would not have appointed Mr Dutton to the important role he has without considering those matters."
However, the prime minister is not concerned about the possible legal cloud hanging over the minister in charge of federal police.
"I don't think so at all," Mr Morrison said when asked if it might pose a problem.
"I would not have taken the decision I have taken without having had those discussions."
