From the Guardian account of UK Labour’s election defeat:
Labour believed they could dominate two full days of the campaign with the non-dom proposal, but the Conservative campaign director, Lynton Crosby, countered with a trademark “dead cat” strategy – a tactic best summarised by Boris Johnson as follows: “There is one thing that is absolutely certain about throwing a dead cat on the dining room table – and I don’t mean that people will be outraged, alarmed, disgusted. That is true, but irrelevant. The key point, says my Australian friend, is that everyone will shout, ‘Jeez, mate, there’s a dead cat on the table!’ In other words, they will be talking about the dead cat – the thing you want them to talk about – and they will not be talking about the issue that has been causing you so much grief.”
This time, the dead cat was supplied by the defence secretary Michael Fallon. The day after Labour’s non-dom announcement, Fallon launched a deliberately excessive attack on Miliband, suggesting he would betray the country by surrendering the Trident nuclear deterrent in order to reach a deal with the Scottish National party: “Miliband stabbed his own brother in the back to become Labour leader. Now he is willing to stab the United Kingdom in the back to become prime minister.” Miliband’s team seethed at the tactic, though several confessed a lingering admiration for its effectiveness.