To be sure, achieving this took some time. When Bill Frist was running the Senate and Pat Roberts was in charge of the Intelligence Committee, Bush and Cheney couldn't get this done (the same FISA and amnesty bill that the Senate will pass today stalled in the 2006 Senate). They had to wait until the Senate belonged (nominally) to Harry Reid and, more importantly, Jay Rockefeller was installed as Committee Chairman, and then -- and only then -- were they able to push the Senate to bequeath to them and their lawbreaking allies full-scale protection from investigation and immunity from the consequences of their lawbreaking.
That's really the most extraordinary aspect of all of this, if one really thinks about it -- it isn't merely that the Democratic Senate failed to investigate or bring about accountability for the clearest and more brazen acts of lawbreaking in the Bush administration, although that is true. Far beyond that, once in power, they are eagerly and aggressively taking affirmative steps -- extraordinary steps -- to protect Bush officials. While still knowing virtually nothing about what they did, they are acting to legalize Bush's illegal spying programs and put an end to all pending investigations and efforts to uncover what happened.
Actually Obama won’t even try to change this, if his past behavior is a guide. Obama has been busy channeling Joe Lieberman when he could have been, and decidedly wasn’t, leading on spying and telecom liability.