The latest One News/ Verian poll shows NZ First still holds the balance of power.
Labour is stagnant at 26 percent, National's leading with 36 percent- but ACT has dropped two points to 10 percent, meaning they'll need NZ First to reach the threshold.
National finance spokesperson Nicola Willis isn't confident Winston Peters will stand by a possible National/ACT coalition.
"It's been 27 years since he's gone with us, so we've said- look, that's a last resort phone call we're prepared to make, but our message is really clear. If you want a change in Government, cast your vote for National."
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