Final answer:
The expansion of slavery into new territories and the debate over states' rights were the two other issues that divided the U.S. leading to the Civil War.
Step-by-step explanation:
The two other issues that divided the U.S. leading to the Civil War were the expansion of slavery into new territories and the debate over states' rights.
The expansion of slavery became a contentious issue as the United States acquired new territory from Mexico after the Mexican-American War.
Southerners believed that slavery should be allowed in these new territories, while Northerners opposed the expansion of slavery.
This disagreement further intensified sectional tensions.
The debate over states' rights was also a major issue leading to the Civil War.
Southern states strongly believed in the rights of individual states to make their own laws and decisions, while Northern states believed in a stronger central government that could regulate and limit the institution of slavery.
This disagreement over states' rights contributed to the growing divide between North and South.