Why won't Winston Peters say he backs the Prime Minister?

Winston Peters refused five times on Tuesday to say whether he still has confidence in Prime Minister Christopher Luxon. Each time he was asked, he pointed reporters to the National Party instead. When a journalist reminded him he is a minister in Luxon's government, Peters walked away. (RNZ)

Peters leads New Zealand First, one of three parties in the coalition government. He is also Luxon's Foreign Minister. "I'm not a member of the National Party," he told reporters, adding he was "the only guy the National Party ever expelled."

Later, a spokesperson for Peters told RNZ that New Zealand First continued its "steadfast support" of the coalition. The gap between what Peters said on camera and what his office said in writing is the latest sign of tension in a three-way government that has faced repeated strain.

Peters also cast doubt on the official account of a leadership challenge within National that prompted the questions. In a Herald Now interview, he said: "I've been in politics for a long time, but for the first time, I saw a one-man coup... if you can believe that." He later told reporters the remark was "more in jest than in fact." (RNZ)

Luxon survived a confidence vote in April and remained leader of the National Party. (RNZ) It was his second such vote in four months. Peters said at the time that Luxon had called for the vote himself to confirm support for his leadership, and that the result was "very clear." (RNZ)

The relationship between Luxon and Peters has been tested before. In late July, Luxon called comments Peters made about a Green MP "racist" and "outrageous" but said he still had confidence in Peters as Foreign Minister. (RNZ) A Stuff poll in early August found most voters wanted Luxon to sack Peters from the foreign affairs job. (Stuff)

New Zealand First minister Shane Jones would not answer the confidence question directly, telling reporters to ask Peters. "Only one person talks for the New Zealand First Party on coalition management matters," Jones said. (RNZ)

The same day, a separate disagreement surfaced over a government announcement about a new study into a second Auckland harbour crossing. Peters called it "a gross, shocking waste of money" and said New Zealand First would put the decision out to tender immediately. (RNZ)

Luxon pushed back, saying all three New Zealand First ministers "signed up for this decision" in cabinet. In New Zealand's system, cabinet collective responsibility means all ministers are supposed to publicly support decisions the government makes together, even if they privately disagreed. Peters said New Zealand First had supported appointing a senior expert on the crossing but believed better options were available, and that he had not broken the rules. (RNZ)

ACT leader David Seymour pointed out that Peters had not used the coalition's "agree to disagree" provision. This is a formal option that lets coalition partners publicly differ on a specific issue without breaching the government's rules. Without using it, Seymour said, voters would have to judge for themselves whether the rules had been broken. (RNZ)

The coalition was formed after the October 2023 election, when National, ACT and New Zealand First agreed to govern together. Luxon had said he was prepared to work with Peters to form a stable government, though he had not yet spoken to him at that point. (Reuters)

The broader context here is a coalition under growing pressure. The leadership challenge, the racist-comments episode, polling showing voters want Peters sacked, and now a public split on infrastructure spending all add to a pattern. Peters is testing the limits of coalition discipline without formally breaking it. He refuses to back Luxon on camera, then offers written assurance of support. That fits his approach throughout this term: keeping as much public distance from National as possible on contentious issues, while stopping short of using the formal mechanisms that would signal a real rupture.

The question for those watching the Beehive is whether Peters is positioning himself ahead of the next budget cycle and election, or whether the friction has gone beyond tactics. The harbour crossing dispute is the more concrete test. If Peters keeps publicly opposing a decision he agreed to in cabinet without using the formal escape valve, the coalition's own rules face a real-world test that words alone cannot fix.