National Union Party (United States)

The National Union Party, commonly known as the Union Party, and sometimes as the Republican-Union coalition, was a wartime coalition of Republicans, War Democrats, and border state Unconditional Unionists that supported the Lincoln administration during the American Civil War. It held the 1864 National Union Convention that nominated Abraham Lincoln for president and Andrew Johnson for vice president in the 1864 United States presidential election. Following Lincoln's assassination, Johnson tried and failed to sustain the Union Party as a vehicle for his presidential ambitions. The coalition did not contest the 1868 elections, but the Republican Party continued to use the Union Republican label throughout the period of Reconstruction.

Abraham Lincoln won the 1860 United States presidential election, polling 180 electoral votes and 53 percent of the popular vote in the free states; opposition to Lincoln was divided, with most Northern Democrats voting for the senior U.S. senator from Illinois Stephen Douglas. Following his inauguration, Lincoln sought support from Douglas Democrats and Southern Unionists for his efforts to preserve the Union. He encouraged the formation of bipartisan Union coalitions in the loyal states that replaced the Republican Party throughout much of the Lower North. Besides allowing voters of diverse pre-war partisan allegiances to act collectively, the Union label served a valuable propaganda purpose by implying the coalition's opponents were dis-unionists.

The preeminent policy of the National Union Party was the preservation of the Union by the prosecution of the war to its ultimate conclusion. They rejected proposals for a negotiated peace as humiliating and ultimately ruinous to the authority of the national government. The party's 1864 platform called for the abolition of slavery by constitutional amendment, a "liberal and just" immigration policy, completion of the transcontinental railroad, and condemned the French intervention in Mexico as dangerous to republicanism.