Political commentator Rachel Maddow hosted a 2018 podcast, Bag Man, and two years later wrote a book of the same name, about Vice President’s Spiro Agnew’s political corruption, obstruction of a Federal investigation and eventual fall from power. She quoted Agnew’s comment, in an interview well after President Richard M. Nixon had also left office, that Agnew believed he might have been assassinated by order of the President if he had refused to resign.
And see: A long-secret 1973 memo on how to become President in a hurry