Which of the following most contributed to Abraham Lincoln’s emergence as a Republican Party leader?

his public debates with Stephen Douglas on the subject of slavery
his defeat of Stephen Douglas in the 1858 Senate race in Illinois
his retirement from the House of Representatives after a single term
his support of popular sovereignty as it pertained to the issue of slavery

1 answer

The factor that most contributed to Abraham Lincoln’s emergence as a Republican Party leader was his public debates with Stephen Douglas on the subject of slavery. The Lincoln-Douglas debates in 1858 garnered national attention and showcased Lincoln's articulate stance against the expansion of slavery, helping to raise his profile and establish him as a prominent figure in the Republican Party.