Even though his slogan was “straight talking” there were one or two things he didn’t think it was necessary to talk straight about. Or talk about at all. Like the deficit. Unlike Ed Miliband he didn’t forget it – for the first time he was speaking from a prepared text and using an autocue. He just didn’t bother. The deficit is a bit like the voters. If you don’t mention it, it might just disappear of its own accord.