Labour MP David Shearer has ruled out a tilt at the leadership after weeks of speculation he would try to get his old job back.

The latest leadership crisis in the Labour Party comes on the heels of years of resignations, criticisms and a lack of confidence.

Claire Trevett writes: So Labour has its leadership barbershop quartet, and although each member is singing to the same audience they are at a very different pitch.

David Parker has confirmed that he will be bidding for the Labour Party leadership, saying the party's forthcoming 100th anniversary milestone must not become a tombstone.

I was once at a party where a child was attacked by one of the host's two rottweilers. Fortunately, there were many people nearby so the dog's teeth and the child's throat were soon parted and the boy suffered no grievous harm.

Labour's acting leader David Parker is expected to put himself forward for Labour's leadership tomorrow.

Rust never sleeps. And neither, it seems, does John Key.

Labour's latest leadership hopeful admits he may be the underdog but his entry could throw the contest wide open if he can persuade enough MPs he's what the party needs.

Andrew Little's not the "compromise" candidate, writes John Armstrong, rather, he's astutely pitched himself as the "unity" ticket in this campaign.

Andrew Little would be the first List MP to lead the Labour Party if he is successful in his bid as leader, but says that is not necessarily damaging to his chances.

Andrew Little, who is running for the Labour leadership, is a lawyer and union leader who has risen quickly through party ranks. He also knows how to dance.

Andrew Little has confirmed he'll contest Labour's leadership, pitting him against former leader David Cunliffe and Grant Robertson for the top job.

New Napier MP, Labour's Stuart Nash says an email linking him to a Dirty Politics figure didn't force him out of his party's leadership race.

The Prime Minister might get to choose who sits where in the Cabinet and on his front bench, but it seems National's caucus has a far more anarchic pecking order - one based on speed and punctuality just once every three years.

Sir Roger Douglas writes: The election was an absolute disaster for Labour. The party's inability to deal with the result is apparent for all to see.

Napier MP Stuart Nash has ruled himself out of the Labour leadership contest so he can turn his electorate into a "Labour fortress".

Maori Party Co-leader Te Ururoa Flavell has been appointed as a Minister after his party inked its confidence and supply deal with National this afternoon.

One of Labour's 2014 election candidates has written a stinging open letter to David Cunliffe, saying he would leave the party if Mr Cunliffe won the leadership contest.

After an initial flurry of snipes, Labour's new interim leader David Parker said he expected the forthcoming battle for the leadership to be "seemly".

Under pressure ahead of his resignation and his pending fight to regain the Labour leadership, David Cunliffe has made some candid and at times bizarre statements.

David Cunliffe officially resigns from his role as leader of the Labour Party today, and says he doesn't know whether he has the support of the caucus majority.

Outgoing Labour leader David Cunliffe has offered leadership rival Grant Robertson the job of deputy leader.

Trevor Mallard has reportedly sent an email to his fellow MP saying he would not stay silent on the Labour leadership race.

If anybody else in Labour is thinking about putting his or her hat into the leadership contest, they should think again, writes Audrey Young.

Far too late for his own good, David Cunliffe has done the right thing by resigning.