Carter has no mandate: Goff

Labour leader Phil Goff says ousted MP Chris Carter doesn't have a mandate to remain as MP for Te Atatu.

Mr Carter was thrown out of the Labour caucus yesterday on a unanimous vote after sending an unsigned letter to media representatives in an attempt to undermine Mr Goff's leadership.

It was later revealed he went on an unsanctioned trip to China and Tibet during a parliamentary recess, which Mr Goff and senior Labour members are citing as Mr Carter's latest rule-breaking behaviour which they suggest has put the MP under stress.

Mr Carter said the Chinese government paid for the trip so he could attend a conference, and he is accusing his former colleagues of using the issue to deflect attention from his message that Labour can't win the next election with Mr Goff as leader.

Mr Carter has said he is going to continue to sit in Parliament until the next election, representing the people of Te Atatu, but won't seek re-election.

Mr Goff told reporters in Auckland today Mr Carter should reconsider that.

"That decision constitutionally is his, but he was elected as a Labour MP and he no longer has that mandate. He needs to reflect on that," Mr Goff said.

"I think that he does not have a mandate to be the Member of Parliament for Te Atatu, given the withdrawal of support from the Labour Party."

Mr Goff said he was confident Labour still had the support of the community in Te Atatu.

Mr Carter said he didn't tell anyone about his trip because it didn't involve any taxpayer funding, and Mr Goff only found out about it after he had returned.

Mr Goff said today Mr Carter had an obligation to tell the party whips about the trip, and seek permission for it.

"Recesses aren't about holidays. They're about doing your party work and your parliamentary business," Mr Goff said.

"If this was parliamentary business he should have notified us and if he wasn't going to be in the country, available to do parliamentary business, he should have notified the whips. He failed to do so."

Questions have been asked by some within the Labour Party, among them senior MP Trevor Mallard, about Mr Carter's behaviour but Mr Goff didn't want to comment on that.

"I'm not a psychiatrist, I can't address that issue, but what I can say is that Chris' behaviour has not been rational over this," he said.

"If he is having difficulties then on a human side we'd want to be supportive. On a political side there is no room for somebody who has behaved the way he behaved yesterday."

Mr Carter was under the gun earlier this year after he mishandled a public apology over the use of his ministerial credit card, and Mr Goff said he thought being caught out over the Chinese trip may have triggered the letter.

"I think Chris' problem was that he developed a sense of entitlement over his travel, over his right to do whatever he liked without meeting the rules."

Mr Goff, however, scoffed at a suggestion Mr Carter wanted to go down in a blaze of glory ahead of further disciplinary action over the trip to China.

He said the behaviour was "calculated as much as it was inept", but he was "not sure whether it was that rational".