If Turei remains the senior co-captain of the Greens it will be harder to get that image change embedded.
At the recent Ratana meeting, she launched a stinging attack on John Key who was at Davos, claiming his view of New Zealand's history was "warped, outrageous and deeply offensive" and that he was a prime example of what the "ignorant, uneducated Pakeha" economist Gareth Morgan had talked about.
Ratana was not the place for deeply gratuitous point-scoring.
Neither did her witterings enhance the Green brand.
Nor did she do her party any good at all with her savaging of Key in Parliament over lending support to the fight against Isis, claiming that through intelligence gathering NZ was part of the American war effort.
Turei's view is the Green party stands for peace and freedom.
But she doesn't seem to understand that sometimes other nations' militaries do have to come to the defence of other threatened peoples to ensure that peace and freedom is secured.
Turei's personal brand is associated with oppositional politics.
Many centrist voters would vote for a true Greens platform if they were sure it wasn't going to be accompanied by the resurfacing of Alliance-style policies. Arguably that won't happen until the Greens elect a modern politician whose focus is square in the mainstream - like Julie Ann Genter - to a leadership role.
Genter has built a strong constituency in Auckland which is starting to transcend party lines. She's a credible commentator on transport and could easily take a ministerial role in a future government if the Greens get serious about getting into power.
Turei yesterday claimed that Norman's resignation was a vote of confidence in her as co-leader.
Certainly his resignation letter, which he read to yesterday's meeting of the Greens' caucus, contained the obligatory nod to Turei: "Together we have built a true political force that serves New Zealanders well and offers genuine choice and leadership on the issues that matter. I know that you will carry this work on with a new male co-leader."
Norman has the demands of a young family to contend with. It makes sense for him to step down at the party's meeting in May. A test of the Greens' seriousness in pursuing power will be if Turei follows him out the door.
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