Who believes that voters should be given the right to decide if slavery would be permitted or banned?

The belief that voters should decide on the legality of slavery aligns with the views of proponents of popular sovereignty, particularly during the mid-19th century in the United States. This concept was notably championed by politicians like Stephen A. Douglas, who advocated for allowing territories to decide for themselves whether to permit or ban slavery through local votes. This idea was a significant aspect of debates leading up to the Civil War, as it aimed to resolve the contentious issue of slavery's expansion into new territories.