Maori Desert Labour

The latest Marae Digipoll suggests that the Maori Party will win all seven Maori seats. It also suggests that the Maori Party will get more party votes than Labour from Maori. One News had a pretty superficial analysis tonight, suggesting that the Maori Party would most probably support Labour because Maori voters had stronger support for Helen Clark and Labour than John Key and National. If that is so why did the PM suggest that a vote for Maori was a vote for National?