Most voters remain unconvinced a new leader would help boost National or Labour's election chances, although support for a switch-up has grown over the past year.

With Opportunity on the rise, new polling from RNZ shows the party's supporters are far more keen on a Labour-led government than a National-led one.

With Opportunity on the rise, new polling from RNZ shows the party's supporters are far more keen on a Labour-led government than a National-led one.