After the success of Kane and Abel and The Prodigal Daughter, Archer published a revised edition of Shall We Tell the President? (1986), replacing Kennedy (in real life a senator and a presidential candidate but never president) with the fictional character Florentyna Kane (who became president in The Prodigal Daughter) in order to link it with the other two novels. …
I enjoyed the two pseudo sequels — but this book is quite different. Stand alone — but set in the timeline of Prodigal Daughter.
President Kane is about to be assassinated for her support of a gun regulation bill.
Note that the U.S. government has still not done much to reduce gun violence in the decades since.