"The Maori Labour caucus is unanimous. We - the Maori members of Labour - think it's time that a Maori leads the party or at least is second in command," Mr Ririnui said.
During his Herald chat Mr Davis, who is challenging Hone Harawira for the seat of Te Tai Tokerau, also entertained the idea that he might lose.
Asked whom he would prefer to win out of Mana leader Mr Harawira or Maori Party candidate Waihoroi Shortland, Mr Davis said: "Obviously I want to win but worse-case scenario, Maori Party. I actually believe the Mana Party's policies are going to make Maori worse off."
Meanwhile, Labour leader Phil Goff has endorsed Mr Cunliffe as the man who would be Finance Minister in a Cabinet he led after failing to do so in a TV interview on Sunday. additional reporting, Audrey Young