Conrad Black was interviewed by Trish Regan on her show tonight. He pointed out that the U.S. attorneys' prosecution originally wanted Black sentenced to 102 years in prison. And after the Supreme court threw out the majority of his sentence, he served 3 years in jail, and he was paroled in 2012. So he served his sentence, and Trump pardoned his record retroactively, despite having served his sentence years ago.

Way before Trump pardoned him, there was a question by some rather high-profile people whether Black should have served any time at all.

Conrad Black also mentioned the malicious political conviction and imprisonment of Scooter Libby.
https://en.wikipedia.org/wiki/Scooter_Libby_clemency_controversy

Involving some of the same players at FBI and DOJ, notably James Comey.
And notably, it was Richard Armitage who later publicly admitted he inadvertantly gave journalist Robert Novak the puzzle pieces that Novak put together to publicly reveal Valerie Plame, not Scooter Libby. And that Libby was convicted of process crimes of perjury and obstruction of justice, not outing Plame. Another example of over 10 years of such prosecutions from DOJ/FBI. Process-crime prosecutions that by the oddest coincidence target Republicans, while Democrat warriors like Lois Lerner, Hillary Clinton, Huma Abedin and Cheryl Mills always seem to slip through the DOJ cracks and avoid prosecution.