The National Party finds itself grappling not only with opposition parties ahead of the upcoming New Zealand election but also with its own supporters who are attempting a high-stakes electoral strategy that could backfire. The tactic involves deliberately engineering an overhang in Parliament, a move that could potentially increase the size of Parliament in National’s favor but comes with significant risks.
An overhang occurs when a party wins more electorate seats than its share of the party vote entitles it to, leading to an increase in the total number of parliamentary seats beyond the standard 120. Currently, projections suggest National may secure 34 seats based on party vote calculations but could win approximately 40 electorate seats, creating a moderate overhang that expands Parliament slightly to 127 seats.
Some National voters have been encouraged to push this strategy further by casting their party vote for smaller right-leaning parties such as ACT or New Zealand First while giving their electorate vote to National candidates. This approach aims to reduce National’s party vote share below its projected 28%, potentially allowing it to capture even more electorates and generating a significantly larger overhang—possibly expanding Parliament up to 136 seats.
However, former Prime Minister Sir John Key publicly cautioned against this tactic at a recent National Party campaign launch. He labeled the strategy as “the opposite of clever,” warning that it could produce unintended consequences. Key’s intervention has drawn considerable attention to what was previously a niche political discussion, making the coordination of such a maneuver more difficult.
Three possible outcomes remain under debate. The most favorable scenario for National would be widespread voter restraint, with supporters keeping both electorate and party votes aligned, preserving party strength without instability. That option now appears unlikely given the growing public discourse on the issue.
The second-best outcome involves near-universal participation among National voters in the split-vote strategy, which would result in a significant overhang. Although this might cost some high-profile MPs without strong electorates, it could ultimately deliver National a dominant parliamentary presence.
The worst-case outcome, some warn, is a partial split where not enough voters coordinate their party votes away from National. In this situation, the party’s lowered party vote share could cost it key constituencies, allowing swing seats such as Maungakiekie, Wairarapa, and Hutt South to revert to Labour control. This would leave National smaller and weaker than anticipated, undermining the party’s prospects.
Despite the risks, some supporters remain determined to pursue the strategy. Prominent advocates, including Harry Mowbray—father of the successful Zuru toy entrepreneurs—have endorsed the approach with zeal, drawing comparisons to intense dedication seen in other fields. National MPs continue to address the issue in public, attempting to discourage supporters from engaging in vote splitting.
As the election approaches, this internal battle within National highlights the complexities and uncertainties of New Zealand’s mixed-member proportional voting system, underscoring the challenges parties face in managing their electorates and vote shares effectively.