A leaked letter has revealed the Nationals first threatened to ditch the Coalition after Senator Jacinta Nampijinpa Price defected to the Liberal Party room, a revelation that undermines David Littleproud's claims that the split was solely over policy disputes. 

The letter, which was sent from the Nationals Bridget McKenzie to Liberal Senate leader Michaelia Cash on May 12, complained that the Nationals would lose party status after being reduced to just four Senators by the loss of Price.

Party status, which requires five members, confers more resources for things like travel, office space, staff and salaries.

Senator Price sensationally defected from the Nationals party room to sit with the Liberal Party room on May 8.

As a member of the unified Country Liberal Party in the Northern Territory, she has the right to choose between the two, but the defection was widely seen as a betrayal. 

Two days after her defection, Senator McKenzie penned the strongly-worded letter, first obtained by news.com.au, which was entitled 'Resignation of Senator Jacinta Nampijinpa Price from The Nationals Senate Party Room'.  

'As a result of her defection, together with the severe drop in Liberal Party vote in New South Wales, from 1 July 2025 The Nationals will hold only four seats in the Senate,' Senator McKenzie wrote.

'This is below what is required to maintain party status in the Senate as a party that is "part of the Government or the Opposition" under the Parliamentary Business Resources Regulations 2017.

'Losing party status in the Senate would have significant implications for The Nationals Senate team as well as the wider Coalition.'

'Depending on the outcome of negotiations between our parties over coming weeks, the Nationals Senate party room will need to consider our position with respect to sitting with the Liberal Party as a Coalition in the Senate chamber.'

The proof that splitting the Coalition was considered at least eight days before the Nationals announced their decision to back out undermines Littleproud's subsequent claims that it was due to disagreements over policy, rather than personnel.

On Tuesday, when he announced the Coalition was breaking up for only the third time in its 80-year history, he claimed discussion had broken down over the Nationals' desire for a commitment on nuclear power, supermarket divestiture powers, regional infrastructure and telecommunications funding.

The varying recollections spilled over into live TV on Wednesday night when Senator McKenzie was asked whether a sticking point had been the Nationals' refusal to agree that they would not speak out against the positions of the shadow cabinet.

'I can tell you, because I was in the National party room that made this decision, the decision that was then conveyed to the Liberal leader. And that was not part of our consideration … it was solely on those four policies,' she told the ABC's 7.30. 

But her comments were soon disputed by Liberal Leader Sussan Ley's staff who texted into the program while the interview was still live. 

'It is not correct to suggest shadow cabinet solidarity was not a sticking point,' the text said.

'We have it in writing that it was a requirement from their leader's office to ours.'

Ley's office texted again to add: '(McKenzie's) language was deliberate to make it sound like it was just about the policies. That is just not correct.'

When the texts were put to McKenzie, she told the ABC in a statement that she stood by her comments.

'The claims made above were not the basis of the Nationals party room decision not to form a Coalition at this time,' she said.