Why did abraham lincoln win the presidency? . a. most americans were abolitionists.. b. the proslavery vote split between several . candidates.. c. he had the most experience of all the candidates.. d. the population in the south exceeded that of the north.

Abraham Lincoln won the presidency in 1860 because the pro slavery vote was split between several candidates.  He ran against three others. They were Northern Democrat Stephen Douglas, Southern Democrat John C. Breckenridge and Constitutional Union candidate John Bell. Lincoln was the only Republican and the first to win a presidential election.