Fox News is at least not trying to hide it as a political op, covering it loud and proud:

GOP launches aggressive 'Lyin' Comey' website ahead of release of former FBI chief's book

NYTimes April 13:

In Comey’s Memoir, Visceral Details and Grim View of Trump by Michael D. Shear

“A Higher Loyalty,” by James Comey, the former F.B.I. director, is the only firsthand account to emerge so far by a former Trump official, describing a leader whose connection to honesty is tenuous at best.

Read Our Review of Comey’s Memoir by Michiko Kakutani

Trump Calls Comey ‘Untruthful Slime Ball’ as Book Details Released by Eileen Sullivan​

Mho, before I read anything on it (only hearing about it on TV news), the Scooter Libby pardon today is mafia tactics, pure and simple, sending a message no less blunt than a horse's head in your bed. And real stupid. For that reason, sounds like Trump's very own idea, and not any White House or GOP political advisors, who would have more smarts than that. It confirms all the mob comparisons in Comey's book which have already been heavily noted in the media

I could be wrong. But I wanted to record my reaction before any detailed knowledge. Because I think a lot of people would react that way, even people with low info. on the whole thing. It's right out of the movies, is why.

Trump attacks Comey ahead of interview

By Alexander Bolton @ TheHill.com- 04/15/18 05:10 PM EDT

[....] Trump in a series of tweets attacked Comey’s credibility and impartiality, calling him a “slimeball” and framing him as a political operator who made decisions based on the assumption that Hillary Clinton would win the presidential election.

Snippets from the pretaped Comey interview reveal him lending credibility to a dossier prepared by a former British intelligence officer alleging that Trump consorted with prostitutes in Moscow in 2013 [....]