Tweeting who to vote for at a by-election on the day the poll is being held is silly, but it isn't exactly the worst thing that any politician has ever done. Hell, it may not even be illegal.
Read MoreChristchurch East
Organise to Win
Of six by-elections since 2008, only one, Mt Albert, looks anything like Christchurch East in the scale of the Labour result.
It's no coincidence those two seats had similar results: They were planned and run on the same organisational template. None of the other by-elections were.
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