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1) This can't happen with this congress, it would have to be done by the next congress.
2) Bush will give a blanket pardon - including for himself.
3) The democratic leaders are in on all of this, and have been for decades, there's no way they would allow this investigation to go through - remember these notes are from "aides" to the leaders - not from the leaders - it's just an exercise to give the "aides" something to do.
4) The FISA bill would never have passed if this type of investigation could ever happen. A new president Obama will have nothing to do with pursuing past wrong doings - he'll follow the advice of his pundit advisors and move forward rather than go after felonies committed by previous members of the government elite. - See Glenn Greenwald's articles this week and statements from Cass Susstein this past weekend.