The Government may intervene after Wellington City Council's airport shares decision and Sir Cliff Richard plans New Zealand shows. Video / NZ Herald, Getty Images
The Greens are at the end of a long internal process to decide whether to oust Tana from Parliament altogether. She earlier quit the party and now sits as an independent MP.
Green Party branches have been discussing whether the party should use the waka-jumping law to oust Tana. Delegates are due to attend a special general meeting on Thursday to vote on whether the party should use the law.