The latest 3 News Reid Research poll still has National with a commanding lead over Labour.
However, support for John Key as preferred Prime Minister has slipped slightly.
He has registered 45.8% the lowest since he became National Party leader.
New Labour Party leader David Shearer debuts at 10.1%.
In the party vote National is down more than three points to 47.5%.
Labour is up three to 29.4%.
The poll was taken over a week in February when asset sales and the Crafar farms dominated the political debate.
It has a margin of error of 3.1% and surveyed 1000 people.