James Shaw has confirmed he will contest the co-leadership of the Greens after party members re-opened nominations against him.
On Monday morning Shaw confirmed to RNZ he will contest the role, saying "I'm not done".
Party members voted to re-open nominations against Shaw on Saturday at the Green's annual general meeting.
The move leaves the door open for a period of one week (from July 23) allowing any member of the party to put their name forward as a potential challenger.
1News understands that of the 107 delegates who voted on Saturday, 75 supported Shaw and 32 voted to re-open nominations.
It’s yet another blow for the co-leader and climate change minister who has faced continued criticism since taking over the role in 2015.
"It's not great... it is hard when there's a group organising against you," Shaw said on Saturday.
"I have to say, I've been through worse experiences."
Just last year Shaw faced a similar leadership challenge with one party member putting in an early nomination against him resulting in the pair going head to head at the annual conference.
Those unhappy with his leadership made up around 30% of voters - a much larger group than the seemingly 3% last year, according to the party’s own numbers.
Chlöe Swarbrick is tipped as a possible threat and would be viewed as a likely favourite if she decided to throw her hat in the ring.
Travis Mischewski represents around 170 members as part of his local branch of the Green Party.
“James should be moving further and faster in regards to climate change in particular. We have a threshold that is coming at us rapidly and we need to be doing something about it,” he said.
“I would love for other MPs to put their names forward.”
The party's other co-leader, Marama Davidson, said the challenge to Shaw's role in the party came as "absolutely a shock".