Subsequently, after gaining the presidency, Kennedy called on Congress to undertake a full reevaluation of immigration law; and he began to revise the book for further publication. In August 1963, excerpts of the 1958 pamphlet were published in "The New York Times Magazine". He was assassinated before completing the revision, but the book was posthumously published in 1964 with an introduction by his brother, then Attorney General Robert F. Kennedy.