At the risk of being seen to keep banging the same drum, the Tories plainly thin more of Mr Miliband than they claim publicly, or they would not be going to such extraordinary lengths to avoid him.
The DUP thing is quite a clever (if desperate) move because if they were to be admitted Sinn Fein would understandably want in too. And many of the other parties have said they really don't want the DUP there (why not?!) , so that would be problematic also
Whatever way you look at it, it's pretty unconvincing stuff