Shortly before President John F. Kennedy was assassinated in 1963, he announced Hornig as the presidential science advisor. Hornig assumed office on January 24, 1964, but did not enjoy good relations with the new president, Lyndon Baines Johnson, who enjoyed a poor relationship with many scientists.[1] He left office at the end of the president's term in 1969, and accepted an executive position with Eastman Kodak Company.[5]