National leader Chris Luxon says he's demoted an MP because he didn't adhere to the culture the party expects.  

Tim Van de Molen has been stripped of all his portfolios after the Privileges Committee found him in contempt of the House for threatening behaviour against Labour's Shanan Halbert.  

Luxon told Mike Hosking Van de Molen could have apologised earlier and that would have de-escalated the situation. 

He says the report is clear - his behaviour was aggressive, hostile, unprofessional and people felt threatened. 

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