As a leader of the republican party, Lincoln was outspoken in his views on slavery and expressed them during the debates of 1858. Which of the following would best fit with his position?

Compromise of 1850
Wilmont proviso
Kansas-nebraska act
Dred scott decision

Wilmot Proviso

The Wilmot Proviso was a proposed amendment to a bill in Congress in 1846 that sought to ban slavery in any territory acquired from Mexico in the Mexican-American War. This aligns with Lincoln's views on slavery as he was against the expansion of slavery into new territories.