National Party leader Christopher Luxon wouldn't say on Friday whether he will tell New Zealanders prior to the election what parties he would prefer to work with if in a position of power after October 14.
Instead, Luxon would only talk about his focus on National's share of the vote.
When it was put to him that that suggested he wanted a National majority, something that is unlikely on current polling, Luxon replied: "Everything is possible."
"I am optimistic and ambitious and aspirational for New Zealand and the National Party," Luxon told reporters on Friday morning.
Recent polling - including the Newshub-Reid Research poll earlier this month - shows National and ACT in pole position to form a government after the October 14 election.
It's led to questions about what policies of ACT's that National may be willing to agree to in order to ensure David Seymour's party's support.
Luxon has for the most part not answered questions on specific policies of ACT's, saying that will occur as part of potential coalition negotiations. However, he has ruled out getting rid of the Zero Carbon Act and doesn't support ACT's treaty referendum idea.
Labour leader Chris Hipkins confirmed this week that his party would outline which parties it would and wouldn't work "within the next week or two".
But Luxon wouldn't commit to anything similar on Friday.
"What I am making very clear to New Zealand voters is that if you want a guaranteed change of Government… the only thing to do is party vote National," he said.
He said he wanted a "strong, stable, National-led Government".
Luxon said National had worked constructively in the past with ACT.
While National and ACT do have momentum in the polls, New Zealand First has also been slowly trending upwards to around the 5 percent threshold.
Although NZ First entering Parliament wouldn't necessarily mean its support is needed by one of the major parties to form a government, it is possible.
Luxon has previously refused to rule out working with Winston Peters.
