The latest 3 News Reid Research poll shows National's popularity has taken a hit.
It follows a string of blunders in last month's Budget, including a complete reversal around increasing class sizes.
According to the poll, Labour and the Greens have gained off the back of those blunders.
National is at 45.8 percent support, down 4.0 percent from its last poll.
Labour was at 33.2 percent, up 3.8 percent, with the Greens the only other party above the 5 percent threshold at 14.4 percent, up 0.3 percent.
NZ First was on 2.8 percent, the Maori Party on 1.4 percent, the Conservatives on 1.1 percent, ACT on 0.5 percent support and Mana on 0.3 percent. No figure was given for United Future.
Assuming the minor parties retained their current electorate seats, National would hold need all its current partners to support it to get to the 62 seats it needs to stay in power.
National would have 57 seats, ACT one, United Future one and the Maori Party three seats. On the left, Labour would have 42, the Greens 18 and Mana one.
If the Maori Party chose to support a Labour-Green alliance, the left could form a government.
Two other recent polls, a Roy Morgan poll before the May 24 budget and a One News poll after it, also showed National at similar levels of support.
The preferred prime minister rankings had National leader John Key at 40.5 percent, Labour leader David Shearer at 12.3 percent, NZ First leader Winston Peters at 4.8 percent and Green co-leader Russel Norman at 4.0 percent.
The poll of 1000 voters was taken from May 29 to June 6 and has a margin of error of plus or minus 3.1 percent.
3 News / NZN
source: newshub archive