Madeleine Duncan Brown, an advertising executive who previously claimed to have had an extended love affair and a son with President Lyndon B. Johnson, said that she was present at a party in Murchison’s Dallas home on the evening prior to the assassination of John F. Kennedy that was attended by Johnson as well as other famous, wealthy, and powerful individuals including J. Edgar Hoover, Richard Nixon, and H. L. Hunt.[5] According to Brown, Johnson had a meeting with several of the men after which he told her: “After tomorrow, those goddamn Kennedys will never embarrass me again. That’s no threat. That’s a promise.”[5][nb 1] Brown’s story received national attention and became part of at least a dozen John F. Kennedy assassination conspiracy theories.[5] Wikipedia