Was it luck, or good judgment? Actually, it was a bit of both. David Cameron committed himself to the AV referendum with a light heart. He trusted the sceptical common sense of the British electorate. He never thought that there would be a majority vote to overthrow the electoral system. Not all Tories shared his confidence, nor did the early opinion polls vindicate it. It seemed as if Mr Cameron had taken the risk of running through an explosives factory with a naked flame.
