Question

do now feb 9, 2026: why did the election of abraham lincoln cause the slave states to fell they needed to leave the union?

Explanation:

Lincoln was a prominent anti-expansion of slavery candidate. Slave states feared his presidency would lead to federal policies restricting slavery's spread, and eventually the abolition of slavery entirely, threatening their economic system rooted in enslaved labor and their perceived state rights to maintain slavery. They believed secession was necessary to protect these interests.

Answer:

Abraham Lincoln was openly opposed to the expansion of slavery into new U.S. territories. Slave states relied heavily on enslaved labor for their agrarian economy, and they feared that Lincoln's presidency would lead to federal actions that would first limit slavery's growth, then eventually abolish it entirely, violating their view of states' rights to uphold the institution. This fear led them to conclude secession from the Union was necessary to protect their economic and social systems built on slavery.