wellington new zealand rule national party regain wide lead opposition labour party opinion poll wednesday party leaders go head-to-head final debate saturday election second poll recent weeks show prime minister bill english party hold power decade hold near double-digit lead poll boost new zealand dollar 0.7375 high six weeks one news-colmar brunton poll show national party jump point 46 percent labour slump seven point 37 percent opinion poll volatile largely indicate race still close call new zealand first party could emerge possible kingmaker next government saw support fall right threshold need seat parliament despite fall support new zealand first lead winston peters debate still center around potential decide role english frustration suggest voters cut middle men like view mr peters decide government new zealand english say english rival labour leader jacinda ardern say party neck neck contest regardless late opinion poll remain absolutely optimistic person come campaign ardern say debate become leader august 37-year-old ardern invigorate labour time opinion poll show party comfortably ahead debate ardern time appear notch point criticize government take measure avoid kind infrastructure failure cause widespread disruption air travel week burst pipeline lead fuel shortage minor party often outsize role new zealand proportional representation system party combination party need 61 parliament 120 members usually 48 percent vote form government support new zealand first drop point percent green party labour work agreement rise point percent together green voter support labour near national poll election since 1996 go minor party ultimately decide labour national end govern bryce edwards analyst wellington-based critical politics ardern reiterate first call would green party necessarily mean coalition say phone call mean stitch do deal say poll give new zealand 's nationals nine point lead final tv debate vote