The ACT Party and the Māori Party are at odds over who is stoking division when it comes to co-governance.
ACT last week called for a public referendum on co-governance - broadly considered as shared decision-making arrangements between Maori and the Crown.
Te Paati Māori says it saw an immediate spike in abusive correspondence afterwards - something ACT leader David Seymour takes no responsibility for.
Political reporter Anneke Smith has more.