A very close 1900 Presidential election. A Supreme Court both biased towards Republicans (as it probably was ) and towards racial justice (which would be different to OTL)
Some racial outrage in the fall of 1900 which Bryan fails to condem (by the way I was never clear how racist he was although a Democrat of that era cannot have been that progressive on this issue)
The Business community (not wanting Bryan) support the insistence on honest manhood suffrage eections in certain states.
Seriously though American, you had the chance between 1865 and seriously fluffed it.