[Fiddlstix]

If granted, it would be only the second posthumous presidential pardon in U.S. history, the first being President Clinton's 1999.....

Pure B.S.
Reagan posthumously pardoned Sacco & Vanzetti.
(If memory serves, there have been some few others. I don't have time to do a search just now. Feel free to correct me if I'm wrong.)

[Lurking Libertarian]

Reagan posthumously pardoned Sacco & Vanzetti.

I think you are mistaken. Saco & Vanzetti were convicted in State (Mass.), not federal, court, and were posthumously pardoned by the Massachusetts legislature.

[Radix]

Reagan posthumously pardoned Sacco & Vanzetti.

Governor Peter Fuller's son protested that decision vociferously. Governor Peter Fuller's son was for years a well known car salesman in Massachusetts.