The correct answer to this open question is the following,
Americans would be expected to "ask what they could do for their country" in their commitment to do anything necessary in order to cooperate with the federal government of the United States under the leadership of President John F. Kennedy.
I think I would have reacted with emotion and support to his message during his inaugural address because President Kennedy represented hope for the American people during difficult times of the Cold War, where the Soviet Union and the United States had many differences and confrontations due to the arms race, the space race, and the spread of Communism.