Chris Hipkins appears to be utilising New Zealand First's growing strength in the polls. 

The Labour leader went up against National's Christopher Luxon last night in what commentators agree was far more fiery second leaders' debate.  

Political Editor Jason Walls told Mike Hosking that Hipkins is now on the attack with a new approach, hinting a vote for National is a vote for Winston Peters. 

However, Jason Walls says if he had to pick a debate winner it would be Winston Peters, who wasn't even in the room. 

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