Labour MP Kelvin Davis has rebelled against his leader, Andrew Little, by giving his support to a charter school – a policy Labour strongly opposes.
Mr Davis was present at a fundraiser for a charter school.
Charter schools use taxpayers' money, but are privately run – an ACT Party policy adopted by the Government.
The fundraiser was for a school run by the He Puna Marama Trust in Whangarei.
Mr Davis is Labour's associate education spokesman, so it's a bad look for him to show support.
Another Labour MP, Peeni Henare, also attended.
Labour sources have told 3 News Mr Little did not want them to go.
Each seat cost $250, raising money to send students to the United States where they aim to visit other charter schools.
The turnout of Labour MPs pleased ACT Party leader David Seymour.
He Puna Marama is set to receive $6 million of government funding over two years. It recently spent $100,000 on a waka.
New Zealand First Party leader Winston Peters was there too. He is against charter schools.
A spokeswoman for Mr Little said he left the decision to go up to the MPs, and their attendance does not reflect any change in Labour's policy on charter schools.