What is the unanswered question to the nullification crisis?

There are several unanswered questions and ongoing debates surrounding the nullification crisis. Some of these include:

1. Was nullification a valid and constitutional response to unjust federal laws, or was it a dangerous assertion of states' rights that threatened the stability of the Union?
2. How would things have unfolded if President Andrew Jackson had used military force against South Carolina to enforce federal law? Would it have escalated into a larger conflict, potentially leading to the dissolution of the Union?
3. Despite the resolution of the immediate crisis, the issue of states' rights and the tension between state and federal powers continued to simmer. How did the nullification crisis ultimately shape the balance of power between the federal government and the states in the long run?
4. Historians continue to debate the extent to which economic factors, such as tariff protection for northern industries, played a role in causing the nullification crisis. Was it primarily a response to economic grievances, or were political and ideological factors more influential?
5. Did the nullification crisis have a lasting impact on the institution of slavery and its relation to states' rights? Some argue that it set a precedent for Southern states to later secede from the Union in defense of slavery during the Civil War.