Almost a third of voters in Te Tai Hauāuru are yet to decide who they want as their electorate MP.
The seat is held by Labour's Adrian Rurawhe, but he's up against Māori Party co-leader Debbie Ngarewa-Packer.
The electorate has been tipped as the Māori Party's best chance of getting back into parliament.
A Māori Television-Curia Research poll has support for Rurawhe at 38 percent, with Ngarewa-Packer well back on 20 percent.
However, 30 percent of voters are undecided.
On the party vote, support for Labour is at 51 percent while the Māori Party is on 10 percent.
Support for National was down at 4 percent, tied with the Greens.
The poll coincided with a debate between Rurawhe and Ngarewa-Packer on Māori TV, covering the end of life and cannabis referendums and party coalitions, among other issues.