The "Wigwam" building specially designed and constructed for the 1860 Republican National Convention, also known as the 2nd Republican National Convention, was a nominating convention of the Republican Party of the United States, held in Chicago, Illinois from May 16 to 18, 1860. The gathering nominated former Representative Abraham Lincoln of Illinois for President of the United States and Senator Hannibal Hamlin of Maine for Vice President. Other candidates at the convention included former New York Governor William H. Seward, U.S. Senator Salmon P. Chase of Ohio, former U.S. Representative Edward Bates of Missouri, and U.S. Senator Simon Cameron of Pennsylvania. Seward had been the favorite going into the convention, and led on the first two ballots. His lead soon melted away to the dark horse Lincoln, who captured the nomination on the third ballot. Lincoln's campaign manager, David Davis, was credited with playing a substantial role in the convention outcome. Lincoln-Hamlin went on to defeat three other major tickets that year, including Democratic nominee Stephen A. Douglas, U.S. Senator from Illinois.