Peter Wilson: Week in Politics - On the campaign trail

The latest polls show Labour's flagship policy promise hasn't worked, next week's leaders debate could be its last chance. Treasury's PREFU warns there's no more money to spare, pressure mounts on National to explain its "mansion tax" policy and Winston Peters edges closer to a comeback.

Monday's Newshub-Reid Research poll was the most important of the campaign so far.

It was taken after Labour announced its flagship dental care policy - and it hasn't worked.