Two candidates top the polls for Christchurch mayoral candidates - Phil Mauger and David Meates. Current councillor Mauger is ahead, with a Kantar poll this month showing he was preferred by 58 percent of the voter base. Meates was at 26 percent, but with 38 percent of respondents unsure, there is the opportunity to win a majority over to his side. The key issues for the region are national housing density rules, three waters reform, fluoridation and the new Christchurch stadium. The pair spoke to Corin Dann.