In January 1860, Lincoln told a group of political allies that he would accept the nomination if offered, and in the following months several local papers endorsed his candidacy.
On February 27, 1860, powerful New York Republicans invited Lincoln to give a speech at Cooper Union, in which he argued that the Founding Fathers had little use for popular sovereignty and had repeatedly sought to restrict slavery. He insisted that morality required opposition to slavery, and rejected any "groping for some middle ground between the right and the wrong". Many in the audience thought he appeared awkward and even ugly. But Lincoln demonstrated intellectual leadership that brought him into contention. Journalist Noah Brooks reported, "No man ever before made such an impression on his first appeal to a New York audience".
On May 9–10, 1860, the Illinois Republican State Convention was held in Decatur. Lincoln's followers organized a campaign team led by David Davis, Norman Judd, Leonard Swett, and Jesse DuBois, and Lincoln received his first endorsement.
On May 18, at the Republican National Convention in Chicago, Lincoln won the nomination on the third ballot, beating candidates such as Seward and Chase. A former Democrat, Hannibal Hamlin of Maine, was nominated for vice president to balance the ticket. Lincoln's success depended on his campaign team, his reputation as a moderate on the slavery issue, and his strong support for internal improvements and the tariff.
On November 6, 1860, Lincoln was elected the 16th president. He was the first Republican president and his victory was entirely due to his support in the North and West; no ballots were cast for him in 10 of the 15 Southern slave states, and he won only two of 996 counties in all the Southern states. Lincoln received 1,866,452 votes, or 39.8% of the total in a four-way race, carrying the free Northern states, as well as California and Oregon. His victory in the electoral college was decisive: Lincoln had 180 votes to 123 for his opponents.