NZ Election 2020: Labour won't give support parties an electoral seat lifeboat

Labour has no plans to lend a helping hand to its support partners staring down the possibility of tumbling out of Parliament.

Jacinda Ardern's as good as ruled out helping out the Greens in Auckland Central, or Shane Jones in Northland.

It comes after a Colmar Brunton Poll had National's Matt King and Labour's Willow-Jean Prime well-ahead of NZ First's Shane Jones, on just 15 percent of the electorate vote.

"We've said that we wouldn't, and actually NZ First hasn't asked," Ardern said at Grey Lynn farmers market on Sunday.

The last Newshub-Reid Research poll had New Zealand First on just 2 percent, which means if Jones fails to win the seat his party will be bundled out of Parliament.

But it's not just New Zealand First in the danger zone - the Greens were hovering just above the 5 percent threshold at 5.7 percent.

Also off the Prime Minister's table is a lifeline deal with the Greens in Auckland Central - where Chlöe Swarbrick is attempting to win the electorate vote.

The Labour leader is backing her own candidate.

"Our view continues to be that the best chance of that seat changing hands is through Helen White," Ardern says.

At the 2017 election, Nikki Kaye won 13,198 votes. Labour's Helen White was close behind on 11,617 while the Green Party's Denise Roche was well-behind with just under 3000 votes.

With Kaye now withdrawn from the race and a National replacement yet to be announced, the Greens are all the more hopeful.

"We are confident we will be coming back into Parliament on the party vote. We're also confident we'll be taking that seat," Swarbrick says.

But Ardern says a Greens win in Auckland Central would be unlikely even if she put her weight behind a deal with them.

"The idea that you can tell voters to switch all of their votes in one direction, I don't actually think is reasonable."

The Greens are also running a two-tick campaign in the Auckland Māori seat of Tāmaki Makaurau with Marama Davidson - but the deal is no deal there too - Ardern told reporters she sees "no reason to date" for deals in any seats.