Final answer:
The Kennedy dream turned into a nightmare due to President Kennedy's assassination and the challenges faced in carrying out his vision for the future of the United States.
Step-by-step explanation:
The Kennedy dream turned into a nightmare due to several factors. While President Kennedy had a vision of progress and a promise of a new future for the United States, his domestic reform plans faced challenges due to his narrow victory and lack of support. Additionally, his presidency was cut short by his assassination in 1963, which had a profound impact on the nation.
The assassination of President Kennedy deeply affected the country, leaving Americans to wonder whether his vision for the nation would be realized. His vice president and successor, Lyndon Johnson, made efforts to continue Kennedy's legacy, but his policies in Vietnam and other factors hindered his ability to fully achieve Kennedy's aspirations.
In conclusion, the Kennedy dream turned into a nightmare due to his untimely assassination and the challenges faced by subsequent administrations in carrying out his vision for the future of the United States.