Phil Goff says Chris Carter is not his problem any more and Labour's caucus is moving on.

John Key says Labour MP Chris Carter should have to provide a doctor's certificate for his two months off work for stress-related issues.

Serious misconduct? Or was Carter speaking his mind and voicing his views?

Labour leader Phil Goff says he thinks errant MP Chris Carter is "unwell" and should have taken Helen Clark's advice to move on if his heart wasn't in his job.

Labour Party president Andrew Little has dismissed a claim made in a letter written by Chris Carter that leader Phil Goff could not win the next election.

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

Labour's ousted MP Chris Carter says his controversial trip to China is being used to cover up concerns about Phil Goff's leadership.

Suspended MP Chris Carter is "unbalanced" and under pressure over international travel costs, says senior Labour MP Trevor Mallard.

Labour MP Chris Carter says his view that Phil Goff can't win the next election and should be replaced is shared by many MPs and party activists.

Chris Carter's attempt to destabilise the Labour leadership ranks as one of the most ineptly executed political plots since Guy Fawkes.

Disgraced MP Chris Carter tonight admitted he wanted his identity to be revealed after writing an anonymous letter aimed at undermining Labour leader Phil Goff today.

Read Chris Carter's 'coup' letter in full.

The Labour leadership is seething about an anonymous note suggesting the party is in strife with the unions.

The Labour Party is furious about a letter claiming there is a plot to overthrow leader Phil Goff, and is trying to hunt down the author.