National has strengthened its lead over Labour in the latest New Zealand Morgan opinion poll.
The survey released tonight shows National up 3 points to 47.5 percent support and Labour down 1.5 points to 36.5 percent -- a lead of 11 points compared with 6.5 points on September 4.
The September 4 result was surprisingly good for Labour because it showed a much smaller gap than other surveys.
Although the trend over the last few weeks has shown Labour starting to catch up, no other poll had been that good for the Government.
Tonight's 11-point gap is more in line with other recent polls.
The poll questioned 823 voters between September 1 and 14, covering the period when the uproar over donations to New Zealand First was at its height.
It showed NZ First up 2.5 points to 5 percent -- just enough for the party to hold seats in Parliament without needing an electorate.
That contradicted last Sunday's TV One poll which showed NZ First slipping to just 1.8 percent.
Tonight's poll showed the Greens dropping 1.5 points to 6.5 percent, ACT unchanged on 1.5 percent, United Future down half a point to 0.5 percent and the Maori Party down 2 points to 1.5 percent.