Christopher Luxon's preferred NZ PM rating rose by ?more than four percentage points in the poll. (Chris McKeen/AAP PHOTOS)Christopher Luxon's preferred NZ PM rating rose by ?more than four percentage points in the poll. (Chris McKeen/AAP PHOTOS) Credit: AAPNew Zealand's ruling centre-right coalition may retain a razor-thin parliamentary majority if an election were held now, a new poll has revealed.. But a surge for the new centrist Opportunity Party could reshape coalition talks ahead of the November vote. Support for the Opportunity Party rose to 6.1 per cent, the first time it has exceeded the five per cent threshold required for parliamentary representation.