With no PoDs prior to said year, how could George McClellan and the Peace Democrats have emerged victorious in 1864? Bonus points if McClellan's acceptance speech at the DNC supports the peace platform (as it was initially going to, before Atlanta).
With McClellan elected on this platform, how would the war progress? Would the CSA get their negotiated peace? Or would the Union fight on? And if that latter, how much damage is done to their cause by these events?