Erica Stanford backs Luxon after failed leadership challenge — but questions remain about who else was involved

National MP Erica Stanford has publicly backed Prime Minister Christopher Luxon, two days after he survived a leadership challenge from Defence Minister Chris Penk at a crisis caucus meeting in Parliament.

In a statement to RNZ on 13 August, Stanford said the prime minister continued to have her full support "as he always has". She also claimed the National caucus was "100 percent united" behind Luxon RNZ.

The statement was Stanford's first public comment since the three-hour caucus meeting on Wednesday 12 August, at which Luxon won a confidence vote prompted by Penk's challenge. In New Zealand's MMP system, a confidence vote is essentially a test of whether the caucus — the party's MPs — still back their leader. Stanford had been visible in the meeting's aftermath, standing behind Luxon as he confirmed the result to media RNZ.

That show of solidarity followed a conspicuous silence. On the Tuesday evening before the caucus meeting, Stanford met reporters at Wellington airport with stony silence, repeatedly declining to say whether she had confidence in Luxon RNZ.

Penk was sacked from Cabinet and stripped of his portfolios after the failed bid NZ Herald. Luxon confirmed that Penk's challenge had prompted the confidence vote, which Luxon won NZ Herald. It was the second leadership contest Luxon had survived as prime minister The Guardian.

Penk has been publicly blamed and punished as the sole architect of the challenge. But National sources have also connected Stanford to the attempt RNZ.

Political commentator Janet Wilson told RNZ's Morning Report that Penk was the "fall guy" and that senior ministers were involved in the challenge. Wilson said she had heard Chris Bishop was "somewhere in there trying to manoeuvre" RNZ.

Bishop rejected any suggestion of involvement. He insisted Penk was alone in mounting the challenge and "working for himself". Bishop also said the fallout's impact on National's chances of remaining in government at the upcoming election would become clear in due course RNZ.

Other caucus members moved quickly to close ranks. National MP Nancy Lu publicly declared she was "absolutely, 100%" backing Luxon's leadership The Spinoff.

The broader context here is one of a caucus publicly closing ranks while the question of who else was involved remains unresolved. Penk has been sacked, but Stanford, named by sources as connected to the attempt, retains her position. Her refusal to answer questions at Wellington airport on the eve of the vote, followed by a written statement afterwards, is a contrast worth noting. So is Wilson's claim that senior ministers were involved, which goes unaddressed by Bishop's denial on his own behalf.

Luxon now faces the task of holding a caucus that he says is unanimous, while commentators and sources point to a wider plot than the official account allows. The election looms, and Bishop himself has acknowledged the fallout's electoral impact is an open question.