The latest TVNZ Colmar Brunton poll shows Labour could govern alone, with 50 percent support.
Meanwhile, the Greens are up to 6 percent - meaning they would make it back into Parliament.
The ACT Party has risen by almost a percent, up to 3.1 percent, so if David Seymour wins in Epsom, he'd bring three extra MPs back to the Beehive with him.