AUCKLAND, NEW ZEALAND - SEPTEMBER 17:  In this handout image provided by TVNZ, Prime Minister John Key (R) and Labour Party leader David Cunliffe (L) go head to head at the TVNZ leader's debate on September 17, 2014 in Auckland, New Zealand. On September 20, New Zealanders will head to the polls to determine the membership of the 51st New Zealand Parliament in this year's General Election.  (Photo by Handout/Getty Images)