Re:Edward Snowden makes 'moral' case for presidential pardon
by dllthomas on Tuesday September 13, 2016 @10:47AM
(#12488712)
For clarity:
When you say "preemptively", you mean in advance of trial or even indictment. So far as I'm aware, the President cannot issue a pardon in advance of the crime.
No, a pardon could not be reversed by a future president (else: Ford could not truly have pardoned Nixon). There's SCOTUS precedent on both of these.