There were several reasons why Southern legislators voted to secede from the Union in 1861, includded
reason are under below
1. States' rights: Many Southern leaders believed that the federal government was infringing on the rights of individual states by enacting laws that interfered with their ability to govern themselves. They believed that secession was necessary to protect their states' sovereignty and preserve their way of life.
2. Slavery: Slavery was a major issue in the South, and many Southern leaders believed that the federal government was seeking to abolish slavery or limit its expansion into new territories. They saw secession as a way to protect the institution of slavery and preserve the economic and social system that it supported.
3. Economic differences: The North and South had different economic systems, with the North being more industrialized and the South relying heavily on agriculture, particularly cotton production. Many Southern leaders felt that their economic interests were not being represented by the federal government, and that secession was necessary to protect their economic well-being.
4. Political differences: The North and South had different political cultures, with the North being more focused on reform and the South being more traditional and conservative. Many Southern leaders felt that they were not adequately represented in the federal government, and that secession was necessary to ensure that their political interests were protected.
Overall, these factors combined to create a sense of dissatisfaction among Southern leaders, which led them to vote in favor of secession and ultimately to the formation of the Confederacy.