Book'em Dano
Makes you wonder who it is Miller is protecting - for sure, it is not Rove
She's protecting her career. If she talks, nobody will ever trust her again.
In summary, they're not protecting anyone, but they want to keep the cloud hanging over the Bush administration and keep hammering them on rumor, innuendo and speculation. All of that would go away if their part of the story is testified to under oath.