Pauline Hanson is launching a bid to have her renegade former colleague Fraser Anning kicked out of Parliament by the High Court, but she could have trouble convincing her Senate colleagues to back the move.

Key points: Pauline Hanson will make a claim relating to bankruptcy proceedings levelled against Fraser Anning before he entered Parliament

Pauline Hanson will make a claim relating to bankruptcy proceedings levelled against Fraser Anning before he entered Parliament Senator Anning's case was settled out of court before Malcolm Roberts was disqualified from the Senate

Senator Anning's case was settled out of court before Malcolm Roberts was disqualified from the Senate The Senate would have to vote to refer Senator Anning to the High Court to assess his eligibility

According to reports in The Australian newspaper, the One Nation leader has written to Senate President Scott Ryan signalling her intention to ask the Upper House to refer Senator Anning's eligibility for office for judgment by the court.

It is understood the claim will relate to bankruptcy proceedings levelled against Senator Anning before he was confirmed as the replacement for ousted Queensland senator Malcolm Roberts, who fell foul of the constitution's dual citizenship ban.

Senator Hanson's argument would be unorthodox because the constitution says anyone who is an undischarged bankrupt is ineligible, but Senator Anning has never been declared bankrupt.

That case, which related to a debt of more than $200,000 from a failed agribusiness investment scheme, was settled out of court before Mr Roberts was disqualified from the Senate and Senator Anning was confirmed as his replacement.

Even though that settlement means he was never declared bankrupt, Senator Hanson seems to be suggesting it could still rule him ineligible under the constitution's ban on bankrupts sitting in parliament.

"I have never been bankrupt or insolvent and therefore not disqualifiable under the constitution," Senator Anning said in a statement.

"Any plans by One Nation to refer me to the High Court are frivolous."

Just moments into his political career, Senator Anning set tongues wagging throughout Parliament House by being escorted into the Upper House ahead of his swearing in by Liberal Democrat senator David Leyonhjelm and Australian Conservatives senator Cory Bernardi.

Earlier, his first One Nation party room meeting had abruptly ended after what he described as a "vitriolic" attack by his colleagues.

Senator Anning has since split with Ms Hanson's party, and there is mounting speculation he could join forces with another group.

"I have met with people from a variety of political parties who support the interests of rural and regional Australians," he said.

"I have declared to the President of the Senate my intent to sit as an independent, and I will be making a statement to this effect when Parliament resumes."

High Court still considering eligibility of Labor members

Earlier this month colourful MP Bob Katter attempted to downplay rumours Senator Anning could join his Katter's Australian Party, saying they were simply good mates who had known each other for 40 years.

The Senate would have to vote to refer Senator Anning to the High Court, and as yet there is no suggestion of whether the major parties would see merit in pursuing yet another case being referred.

In the event the Queenslander was disqualified, the next One Nation candidate likely to benefit from a recount would be Senator Hanson's sister, Judy Smith.

The High Court is still considering other eligibility cases arising from the citizenship fiasco, as Labor member David Feeney and his Senate colleague Katy Gallagher fight for their political lives.

The Coalition has again threatened to use its slim majority in the Lower House to send a number of other Opposition and crossbench members to plead their case before the nation's highest legal authority, after it was revealed they were still British citizens when nominations closed ahead of the 2016 federal election.

But Labor argues there are Liberal and National members who still have serious eligibility clouds hanging over them also.