The good news for Labour was Mana pushing the Maori Party into third place. That places a further question mark over whether the Maori Party will return enough MPs to Parliament at next year's election to help John Key stay in power.
The biggest loser from the byelection is thus potentially the party which did not stand a candidate - National.
Rather than being the work of Labour's "formidable machine" running a "fantastic" campaign - as Shearer also claimed - the result is the product of the current tragedy in Maori politics.
At first glance, Mana would seem to be the real byelection winner, having lifted its vote from 14 per cent to close to 25 per cent.
More crucially, however, the combined vote of Mana and the Maori Party was larger than Labour's total.
All that the two Maori parties achieved in Ikaroa-Rawhiti was to split the non-Labour vote to neither's advantage.
Understandably nervous about his own parliamentary future, which hangs on a majority in his Te Tai Tokerau seat of little more than 1100, Hone Harawira has renewed his call for Mana and the Maori Party to work more closely.
The Maori Party's Pita Sharples did not rule out the possibility of co-operation. But neither did he show any real enthusiasm for the idea.
To thwart Labour, both parties would have to agree to an electoral accommodation that saw them not stand against each other in some, if not all, of the seven Maori seats.
That will require some difficult-to-reach compromises. However, the survival of some kind of political force representing Maori in Parliament is ultimately at stake.
On their current course, the Maori Party and Mana are locked together in what amounts to a suicide pact.
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