The 1864 National Union National Convention was the United States presidential nominating convention of the National Union Party, which was a name adopted by the main faction of the Republican Party in a coalition with many, if not most, War Democrats after some Republicans and War Democrats nominated John C. Frémont over Lincoln. During the Convention, the party officially called for the end of the ongoing Civil War, the eradication of slavery and the adoption of the Emancipation Proclamation.
President Abraham Lincoln of Illinois
Commanding General Ulysses S. Grant of Illinois (No Political Intentions)
Treasury Secretary Salmon P. Chase of Ohio (Declined Consideration)
The National Union Convention was held on August 14–16, 1866, in Philadelphia, Pennsylvania.
Meeting of the National Union Convention at Philadelphia, August 14, 1866—Sketched by C. H. Wells (Harper's Weekly, September 1, 1866)
Thomas Nast's rendition of news reports about the convention