what does the last sentence mean?
Among others she telephoned Maude Shaw, upstairs, and Mrs. Auchincloss, on O Street; and she dealt with a bewildered inquiry from Lee Radziwill in London. Nancy's approach, like Nancy, was gentle and thoughtful. "What are you doing?" she would begin cautiously, and then she would proceed in stages, explaining that the President had been hurt, that he had been badly hurt, that his condition was critical, that it would be wise to prepare for the worst. It was a valiant attempt at tact, though the enormity of what had happened crushed it; in two instances the result was hysteria.