National leader Christopher Luxon has ruled out any arrangement in Government with Te Pāti Māori after the 2023 election.
Some recent polling has shown National would likely need the support of Te Pāti Māori and ACT to form a Government after October 14.
In a statement on Wednesday, Luxon said the bridge between National and Te Pāti Māori "is too wide to close".
"Te Pāti Māori of 2023 is a very different party to the one National signed a confidence and supply agreement with three times from 2008," said Luxon.
"I am making clear today that a vote for Te Pāti Māori is a vote for the Labour/Greens/Māori Party Coalition of Chaos and continued economic mis-management."
While polling has shown Labour would likely need the support of the Greens and Te Pāti Māori to form a Government as well, the parties have not committed to working together.
Until now, Luxon has only said National working with Te Pāti Māori was unlikely. Last week, he told AM that he believed the party would side with the left bloc if it was in a kingmaker position.
"I think it's pretty clear that Te Pāti Māori are going to side with Labour and the Greens," Luxon said. "That's been their choice and their decision, and I think that's pretty obvious here.
"We've got a long way to go to the election, my job is to drive the National Party vote. If you want to change the Government, that's what you've got to do."
On Newshub Nation on Saturday, Te Pāti Māori co-leader Rawiri Waititi said the party "was not left or right".
"We are Māori and we are straight up the guts," Waititi said when asked about potential coalition partners. "The dream position for us is to ensure we get the policy gains that our people deserve."
Waititi said the party would get policy gains "from being the korero on that whare".
Te Pāti Māori has said it would only work with parties focused on a Treaty of Waitangi-centric New Zealand.
Newshub revealed earlier this year a bottom line for Te Pāti Māori in any potential coalition neogitations would be the Crown accepting recommendations of a milestone Waitangi Tribunal report.
The report found the Crown breached the Treaty's principles by proclaiming sovereignty over the North Island and other parts of New Zealand.
It recommended the Crown apologise, return all Crown-owned land in the north to local Māori, compensate and work with Māori to determine constitutional processes and institutions that give effect to what was agreed in the treaty.
Waititi told Newshub at the time: "If we can look at, in an adult and mature conversation about coming together, creating a transformative constitution based on the Te Tiriti o Waitangi, to come up with an Aotearoa that's more equitable, equal, fair and just for everybody, as our people understood it to be, I think this country could be the best country on Earth."
Waititi said that involved "self-governance" of "Māori over our domain" and the "self-governance of Pakeha over their domain".
Te Pāti Māori's Mana Motuhake policy includes commitments to establishing a Māori Parliament, entrenching Māori electorates, making Waitangi Tribunal recommendations binding on the Crown and overhauling the Te Tiriti settlement process.
Luxon said on Wednesday National is "deeply committed to improving outcomes for Māori, but doesn’t believe separate systems is the best way to do this".
The announcement from the National Party comes after Meka Whaitiri's defection from Labour to Te Pāti Māori and Te Pāti Māori's co-leaders on Tuesday being booted out of Parliament.
"Unfortunately, this House hasn't treated wahine well in the past," Waititi said after being ejected.
"This place is not a safe place for our people. Hence why we do things our way and make sure they're looked after.
"I will always move with my seat for our wahine to ensure that they are safe."
