By mid-September 1864, despite the Union conquest of Atlanta and the continuing siege at Petersburg, political talk and the potential for Lincoln’s defeat in November threatened to obscure any advances the North achieved on the battlefield. The Radical Republicans had broken with Lincoln and nominated dissident John C. Fremont, while mainstream Republicans remained supportive of Lincoln’s reelection. The Democrats had also split into a War Faction and Peace Faction; the Democrats’ leading presidential candidate was George McClellan of the Peace Faction. Voices of opposition to the war were loud from the Democrats, Northern Copperheads, and other administration critics, including the Radical Republicans who believed Lincoln too conciliatory to the rebellious South. In the North, politics made the electorate as well as President Abraham Lincoln increasingly uncomfortable.