The standard rumor at the time was that Rumsfeld, as chief of staff, had persuaded President Ford to appoint George H.W. Bush as director of Central Intelligence, assuming that that got rid of a potential competitor for the presidency.
What you make up in your heads sticks if it's good, falls out if it's bad. If we still remember something a day after we made it up, it might be worth building on.
Everyone calls himself a friend, but only a fool relies on it; nothing is commoner than the name, nothing rarer than the thing.