There could be a battle brewing between Green Party MPs and grass root party members.  

Independent MP Darleen Tana has written a letter to the Greens which says they will vote with the party, which will mean proportionality stays the same.  

The Green Party leadership will take the proposition to use the Waka Jumping legislation to the wider party membership on September 1st.  

Political commentator Brigitte Morten says told Ryan Bridge they'll be hoping members agree.  

She says if they vote against the plan, the leaders face being out of step with the wider party membership. 

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