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.