There are a whole lot of historical 'conspiracy theories' out there and at least some of them are more than likely true.
Once an administration covers up (lies) it is in the best interests of all concerned (the politicians at least) that the lie remain covered up.
Otherwise (again, from the politician's point of view) the public trust has a large hole in it.
However, since GWB has so far shown himself to be a better sort of public figure than we've seen recently; I'm hoping that, without lifting the carpet himself, enough of the evidence will see daylight and enough noise will result, so that the lid will pop off 'by itself'.
Guess I have some idealism left afterall.
And that will happen more easily -- and may only be possible -- if those who want to bring out the evidence are allowed to do so.