The switch in tactics is understandable, if not defendable. Last week was the week from hell for the Prime Minister. He is in no mood for a repeat.
Yesterday was the opportunity to make a fresh start and get National's campaign on track. Key preferred to "focus on the issues that matter" - fast becoming the catchphrase of this election. That included housing, with Key tackling one of National's weak points by promising more assistance to first-home buyers if they cash up their KiwiSaver contributions.
By erecting a brick wall to a particular line of questions, Key is obviously hoping the media will get bored and - like National - move on to other things.
Although they would never say it, other parties would not be too worried if that was to happen.
Whalegate (for want of a better name) has probably inflicted as much damage on National as it is likely to do. Whether the story stays alive hangs on whether there are further emails not referred to in Hager's book which are equally as incendiary - and whether the holder of those emails decides to release them.
If there is more to come, Key might find that silence is not golden.
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