The Labour Party has selected Michael Wood as its new Mt Roskill candidate to take over from longstanding MP Phil Goff.
The selection was held early because of a possible by-election if Mr Goff wins the Auckland Mayoralty in October.
Mr Goff is considered the front runner and Labour leader Andrew Little appeared to be fairly certain of Mr Goff's success. He told the Herald after the launch that was a factor in selecting Wood early.
"The reality is it's more likely than not that there will be a by-election at the end of the year because it is more likely than not that Phil Goff will be elected as Mayor so we needed to be ready."
Mr Goff has been the Mt Roskill MP since 1981, with a three-year break between 1990 and 1993. Mr Goff had a 8,000 vote majority in 2014 and it has traditionally been seen as a safe Labour seat although it has become more marginal, partly because of boundary changes. In 2014 National got 14,275 party votes - 2000 more than Labour - but one quarter of National voters voted for Mr Goff.