Sorry if I came across as being arrogant. I don't use Reddit (not much at least — it's good for usage of topics regarding niche interests, like bicycles).
Still, further reading from the Wikipedia-article (which may or may not be insufficient and/or faulty) other than what I quoted, states as follows:
"There remains disagreement and uncertainty about the full scope and legal implications of federal pardons, due largely to the lack of historical precedent.[2] It is unclear how or whether the pardon power applies to cases involving obstructions of an impeachment;[10] whether pardons can be issued in secret;[11] or if the power includes the ability to grant a habeas corpus petition for a state offense where it has been denied by a federal court.[1][8] Likewise, it is debated whether a president can pardon themselves (self-pardon), as it has never been attempted, much less challenged in court.[12][2]"
"According to the U.S. Department of Justice, a total of 22,485 executive clemency actions were taken from 1900 to 2017. Since the late 20th century, the number of clemency grants, as well as the proportion of clemency petitions that have been granted, have declined.[2]"
It seems that there's a rather large amount of grey area as far as this institutional power goes.
Still, you seem to be far more knowledgeable about these kinds of matter than I am, and so I will defer to your expertise (I'm not being snarky or sarcastic here, just so you know).
American law is vast and deep indeed.
