I don't know, it seems like it overrules the verdict (which only the president can do) but I am not sure. Its worth noting that initially, Libby specifically wasn't pardoned but his sentence was commuted.
> After a failed appeal, President Bush commuted Libby's sentence of 30 months in federal prison, leaving the other parts of his sentence intact. As a consequence of his conviction in United States v. Libby, Libby's license to practice law was suspended until being reinstated in 2016. President Donald Trump fully pardoned Libby on April 13, 2018. [1]
Which is rare:
> After Libby was denied bail during his appeal process on July 2, 2007, Bush commuted Libby's 30-month federal prison sentence, calling it "excessive", but he did not change the other parts of the sentence and their conditions. That presidential commutation left in place the felony conviction, the $250,000 fine, and the terms of probation. Some have criticized the move, as presidential commutations are rarely issued, but when granted they have generally occurred after the convicted person has already served a substantial portion of his or her sentence: "We can't find any cases, certainly in the last half-century, where the president commuted a sentence before it had even started to be served," said former Justice Department pardon attorney Margaret Colgate Love. [..] [1]
There's 2 movies which involve the Plame affair, Fair Game and Vice. Both well worth it, though its more a side thing in Vice while its the main subject in Fair Game.
> After a failed appeal, President Bush commuted Libby's sentence of 30 months in federal prison, leaving the other parts of his sentence intact. As a consequence of his conviction in United States v. Libby, Libby's license to practice law was suspended until being reinstated in 2016. President Donald Trump fully pardoned Libby on April 13, 2018. [1]
Which is rare:
> After Libby was denied bail during his appeal process on July 2, 2007, Bush commuted Libby's 30-month federal prison sentence, calling it "excessive", but he did not change the other parts of the sentence and their conditions. That presidential commutation left in place the felony conviction, the $250,000 fine, and the terms of probation. Some have criticized the move, as presidential commutations are rarely issued, but when granted they have generally occurred after the convicted person has already served a substantial portion of his or her sentence: "We can't find any cases, certainly in the last half-century, where the president commuted a sentence before it had even started to be served," said former Justice Department pardon attorney Margaret Colgate Love. [..] [1]
There's 2 movies which involve the Plame affair, Fair Game and Vice. Both well worth it, though its more a side thing in Vice while its the main subject in Fair Game.
[1] https://en.wikipedia.org/wiki/Scooter_Libby