Labour leader David Shearer says the display of David Cunliffe's leadership ambitions at last week's party conference were "disloyal'' and destroyed trust he had in his MP.
Mr Shearer said he wanted to move on from the leadership debate that arose last weekend and he had the full support of his caucus.
Mr Cunliffe was demoted to the back bench and stripped of his portfolios after attempting to undermine Mr Shearer's leadership.
Mr Shearer told TVNZ's Q + A programme today that the leadership question "came to a head'' at the conference.
"Unfortunately what happened was we had a very, very successful conference that was overshadowed by David Cunliffe talking about leadership and not being able to be loyal to me as the leader, that's why I took the action I did.