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

Question

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