Joshua, son of none

This is the story of a doctor, who as an attending physician at JFK's death at Hillcrest Hospital in Dallas, takes some genetic material from a throat wound, freezes it in LN2; and then starts along the path of cloning JFK. He identifies a wealthy Democrat, and though various manipulations his "father" and the doctor have him experience many of the same events JFK did in his life. This is to produce a leader like JFK..only in this case Joshua Francis Kellogg. I wont give away the end, its pretty quick read; as I read it long ago while I was in college at a bookstore in the afternoon.