On Oct. 17, 1974, forty-nine years ago today, President Gerald Ford made an historic appearance before Congress to testify about his pardon of former President Richard Nixon, which he had issued on Sept. 8. Nixon had resigned on Aug. 9 to avoid certain impeachment and removal from office for his cover-up of the Watergate break-in and other misdeeds. As a member of the subcommittee hearing Ford’s testimony, I challenged the president about the pardon, the only one to do so, asking him about a “deal” and the suspicious way the pardon was issued. Now, nearly a half century later, I...