[dgfitz]

Sorry, those are your examples? Besides the Nixon disaster (stop hiding behind that) and confederate soldiers, any other examples?

[JumpCrisscross]

You're arguing, with no evidence, for a claim with counterfactual precedent. (And look up preemptive pardons. Not been done. But you're lacking imagination if you can't see the utility of a pardon absent indictment or even accusation.)

[kragen]

Even a single example of something happening is abundantly adequate to demonstrate that it is not impossible.