Was the Kansas Nebraska act pro slavery or antislavery?

The Kansas-Nebraska Act of 1854 was pro-slavery in that it allowed the territories of Kansas and Nebraska to decide for themselves whether to permit slavery through popular sovereignty. This effectively repealed the Missouri Compromise, which had previously banned slavery in those territories. The act led to significant conflict, known as "Bleeding Kansas," as pro-slavery and anti-slavery forces clashed over the issue. Thus, while it theoretically allowed for both positions, it favored the expansion of slavery into new territories.