The response that would best fit with Abraham Lincoln's position on slavery during the debates of 1858 is the Wilmot Proviso.
Lincoln opposed the expansion of slavery into the territories, which the Wilmot Proviso aimed to accomplish by banning slavery in lands acquired from Mexico. The Dred Scott decision, on the other hand, upheld the legality of slavery in the territories, which contradicted Lincoln's views, and the Kansas-Nebraska Act allowed for the possibility of slavery in new territories through popular sovereignty, which Lincoln also opposed.
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