Let's say the Copperheads are more active in 1863-1864 as it looks somewhat worse than OTL. However, the CSA makes some big mistakes Aug 1864 and the whole war reverses. The Republicans win even bigger than OTL. Lincoln AND Johnson are shot in TTL and reconstruction is harsher. The Democrats get decimated in the elections and there is no Democratic Party worth speaking of when reconstruction finally ends. What party do you think will take the Democrats place? What policies are they likely to have? Assume that do to them their having no connection to the ACW they want to be competitive both in the north and the south.