Final answer:
Dwight's response is unknown. The Missouri Compromise line is seen as a temporary solution, not a final resolution.
Step-by-step explanation:
In the given text, the former president's reaction is not explicitly mentioned.
We can infer that Dwight's response is not given and remains unknown.
In the second part of the question, Dwight refers to the Missouri Compromise line as 'a reprieve only, not a final sentence.'
This means that the Missouri Compromise was seen as a temporary solution or delay, not a permanent resolution to the issue at hand.