I'm not sure why people are applauding this so much?
It's too far removed to actually touch Bush other than as negative press.
First, without any evidence (like a memo or something) or another witness, it's Cheney's word against Libby's.
Second, even if there is evidence (like a memo from Cheney to Libby) or another witness to Cheney and Libby's conversation, it still only goes as far as Cheney.
Even if it gets Cheney under oath to testify about his role, do you really think he'd take the president down with him... even if it's true? Do you think Cheney would do that to 'the party'? It's one thing if the VP goes down, another if it's the president himself. That would mean there'd also have to be documentary evidence or another witness to Bush and Cheney's conversation.
Somehow, I just don't think that's all gonna happen... even if it's true and Cheney did tell Libby to leak information per authorization of the president.
... and they called Reagan the teflon president.