Labour's two Dunedin MPs on Saturday gave their support to Grant Robertson in the election for the party leadership.
Electorate MPs David Clark and Clare Curran said Mr Robertson will make an excellent prime minister and is the party's best chance to defeat National in next year's election.
They said he is a clear communicator with strong principles and a highly effective politician who was raised in Dunedin.
A 3 News three poll on Friday night showed Mr Roberston has the least support of the three contenders.
The poll showed David Cunliffe with 39.6% and Shane Jones with 31.6%. Mr Robertson had 28.8%.
Ms Curran said she's not worried by the 3 News poll, because it surveyed the public and it's up to party members and affiliated unions to make the decision.
Mr Clark said Mr Robertson has been in the spotlight less because he's the only one of the three candidates who has not been a cabinet minister.