What was the “root issue” that prevented Congress from adding Texas to the U.S. for many years?

Question

A the Civil War
B the issue of slavery
C a treaty with Mexico
D the Monroe Doctrine

Answer 1

B. the issue of slavery

The root issue that prevented Congress from adding Texas to the U.S. for many years was primarily the issue of slavery. Texas was a slave-holding territory, and its admission as a state raised concerns about the balance of power between slave and free states in the Union. This contentious debate delayed its annexation until 1845.