Title: 1860 United States presidential election in Michigan
Content:  The 1860 United States presidential election in Michigan took place on November 6, 1860, as part of the 1860 United States presidential election. Voters chose six representatives, or electors, to the Electoral College, who voted for president and vice president. Michigan was won by Illinois Representative Abraham Lincoln (R–Kentucky), running with Senator Hannibal Hamlin, with 57.23% of the popular vote, against Senator Stephen A. Douglas (D–Vermont), running with 41st Governor of Georgia Herschel V. Johnson, with 43.97% of the popular vote.
Title: 1860 United States presidential election in Illinois
Content:  The 1860 United States presidential election in Illinois took place on November 6, 1860, as part of the 1860 United States presidential election. Illinois voters chose 11 representatives, or electors, to the Electoral College, who voted for president and vice president. Illinois was won by the former congressman Abraham Lincoln (Whig–Illinois), running as a Republican with Senator Hannibal Hamlin, with 50.69% of the popular vote, against Senator Stephen A. Douglas (D–Illinois), running with 41st Governor of Georgia Herschel V. Johnson, with 47.17% of the popular vote. Liberty Party (under the name Union Party ) candidate Gerrit Smith received 35 of his 171 popular votes in Illinois alone. The other 136 votes came from Ohio.
Title: 1860 United States presidential election in Ohio
Content:  The 1860 United States presidential election in Ohio took place on November 6, 1860, as part of the 1860 United States presidential election. Ohio voters chose 23 representatives, or electors, to the Electoral College, who voted for president and vice president. Ohio was won by Illinois Representative Abraham Lincoln (R–Kentucky), running with Senator Hannibal Hamlin, with 51.24% of the popular vote, against Senator Stephen A. Douglas (D–Vermont), running with 41st Governor of Georgia Herschel V. Johnson, with 43.30% of the popular vote. Liberty Party (under the name Union Party ) candidate Gerrit Smith received 136 of his 171 popular votes in Ohio alone. The other 35 votes came from Illinois. The 1860 presidential election in Ohio began a streak in which no Republican candidate won the election without carrying the state.
Title: 1860 United States presidential election
Content:  The 1860 United States presidential election was the 19th quadrennial presidential election, held on November 6, 1860. In a four-way contest, the Republican Party ticket of Abraham Lincoln and Hannibal Hamlin, absent from the ballot in ten slave states, won a national popular plurality, a popular majority in the North where states already had abolished slavery, and a national electoral majority comprising only Northern electoral votes. Lincoln's election thus served as the main catalyst of the American Civil War. This election resulted in the first Republican president being elected. The United States had become increasingly sectionally divided during the 1850s, primarily over extending slavery into the 
Title: 1860 United States presidential election in Iowa
Content:  The 1860 United States presidential election in Iowa took place on November 6, 1860, as part of the 1860 United States presidential election. Iowa voters chose four representatives, or electors, to the Electoral College, who voted for president and vice president. Iowa was won by Illinois Representative Abraham Lincoln (R–Illinois), running with Senator Hannibal Hamlin, with 54.61% of the popular vote, against Senator Stephen A. Douglas (D–Vermont), running with 41st Governor of Georgia Herschel V. Johnson, with 43.22% of the popular vote.
Title: 1860 United States presidential election
Content: Abraham Lincoln, former representative from Illinois ; William Seward, senator from New York ; Simon Cameron, senator from Pennsylvania ; Salmon P. Chase, governor of Ohio ; Edward Bates, former representative from Missouri ; John McLean, associate justice of the U.S. Supreme Court ; Benjamin Wade, senator from Ohio ; William L. Dayton, former senator from New Jersey Republican candidates: 
Title: 1860 United States presidential election in Connecticut
Content:  The 1860 United States presidential election in Connecticut took place on November 2, 1860, as part of the 1860 United States presidential election. Voters chose six electors of the Electoral College, who voted for president and vice president. Connecticut was won by Republican candidate Abraham Lincoln, who won by a margin of 32.36%.
Title: 1860 United States presidential election in Indiana
Content:  The 1860 United States presidential election in Indiana took place on November 6, 1860, as part of the 1860 United States presidential election. Indiana voters chose 13 representatives, or electors, to the Electoral College, who voted for president and vice president. Indiana was won by Representative Abraham Lincoln (R–Illinois), running with Senator Hannibal Hamlin, with 51.09% of the popular vote, against Senator Stephen A. Douglas (D–Illinois), running with 41st Governor of Georgia Herschel V. Johnson, with 42.44% of the popular vote.
Title: United States presidential elections in Florida
Content:  The election of 1860 was a complex realigning election in which the breakdown of the previous two-party alignment culminated in four parties each competing for influence in different parts of the country. The election of Abraham Lincoln, an ardent opponent of slavery, spurred the secession of eleven states and brought about the American Civil War.
Title: 1860 United States presidential election in New Hampshire
Content:  The 1860 United States presidential election in New Hampshire took place on November 2, 1860, as part of the 1860 United States presidential election. Voters chose five electors of the Electoral College, who voted for president and vice president. New Hampshire was won by Republican candidate Abraham Lincoln, who won the state by 17.64%.

Question: who ran against abraham lincoln for president in 1860?
Answer: Stephen A. Douglas.