| May 9–10, 1860|
John Bell of Tennessee
| Baltimore, Maryland|
| Edward Everett of
The 1860 Constitutional Union National Convention met in Baltimore's Eastside District Courthouse, nominating John Bell of Tennessee for president over Governor Sam Houston of Texas on the second ballot. Edward Everett was nominated for vice-president at the convention on May 9, 1860, one week before Lincoln.
1860 Constitutional Union Convention Wikipedia
As the Republican Party strengthened and the Democratic Party fractured, many former Whigs and Know Nothings founded the Constitutional Union Party. who hoped to stave off the danger of secession by avoiding the slavery issue.
Constitutional Union candidates:
John Bell was a former Whig who had opposed the Kansas–Nebraska Act and the Lecompton Constitution. Edward Everett had been president of Harvard University and Secretary of State in the Fillmore administration. The party platform advocated compromise to save the Union, with the slogan: "The Union as it is, and the Constitution as it is."
Everett was nominated by voice vote.