Experts agree Darleen Tana's days in Parliament are numbered.

On Thursday, Green Party delegates voted to ask House Speaker Gerry Brownlee to oust the now-independent MP.

Newstalk ZB political editor Jason Walls says this is uncharted territory for the Party - and it's unclear how this will play out ahead of the next election.

"We've seen the polls move up and down over the last seven months or so, with how long this story has been running for. I think it's had an impact on the party, but we're still two years away from an election - so I think they can bounce back." 

LISTEN ABOVE