I still maintain that this is Romney's nomination. The only chance that it is not is a slim one, and requires that two of the three conservatives bow out and unite behind the third (those three conservatives are Gingrich, Santorum and Perry).
If this is going to be an at-all interesting race, Perry needs to get the ball rolling by being the first to give up the ghost. And now he has a good reason to…. he's running third in his home state of Texas.