Former Progressive leader Jim Anderton has come full circle and is now running Labour's campaign for the Christchurch East byelection.
Once a former Labour president, he split away from Labour to form a breakaway party but eventually made his peace with them and governed with Labour for nine years.
The 75-year-old retired from Parliament in 2011 but with his campaign experience with Labour, then the Alliance and the Progressive Party and 27 years representing Christchurch seats of Sydenham and Wigram, he was asked to do the job.
Party president Moira Coatsworth told the party's annual conference the byelection on November 30 would be "an absolute fight for us to win".
While it was won by Labour's Lianne Dalziel in 2011, with a majority of 5334, National won the party vote by 46.10 per cent to Labour's 31.65 per cent.