There was a really interesting article in Time about this regarding Bush's legacy of torture. They said it might be prudent of Obama to pardon Bush, because then it's a permanent, unspinnable record that Bush in fact authorized torture.
"Compromise, hell! That's what has happened to us all down the line -- and that's the very cause of our woes. If freedom is right and tyranny is wrong, why should those who believe in freedom treat it as if it were a roll of bologna to be bartered a slice at a time?"
RIP Jesse Helms