Jacqueline Kennedy was so racked with loss after her husband's assassination in 1963 that she spoke repeatedly of suicide to her confessor, a new book about the Kennedys' Irish-Catholic heritage reveals. "It is so hard to bear," she told the Rev. Richard McSorley months after her husband's death. "I feel as though I am going out of my mind at times. Wouldn't God understand if I just wanted to be with him?" Later, after she seemed to rebound, she sank further into gloom and again spoke of suicide as a way out, saying, "I was glad that Marilyn Monroe got...