Rutherford B. Hayes in fairness had both been a competent Union general (unfortunately those were relatively thin on the ground as it was) and in the first parts of Reconstruction had been one of the Radicals. Over the course of Reconstruction, his ever-present fiscal conservatism (with the usual cavaeats about what that actually meant in the real world) had come to overtake the moralistic element of the Republican Party. In 1876 he ran against Samuel Tilden, who in turn ran one of the more racist campaigns of the era. The Civil War, as it would do for the period up to the inauguration of TR for his first term he got himself dominated the campaign as far as rhetoric, the Democrats using the Bloody Shirt Libel (Butler did give a speech condemning Ku Klux outrages and did refer to a specific incident, he never waved a bloody shirt while so doing), the Republicans pointing out that the Confederates were all Democrats. Very childish.
Yet when it finally went down to the wire the massed violence in the South prevented what would have otherwise been a clear victory for Hayes. The divisions between the two factions were pretty hostile and there was a brief period where civil war seemed a possibility. Very much not interested in another long bloodbath like that, the two sides dickered out the http://en.wikipedia.org/wiki/
The biggest thing that prevented the USA from going too far to aid blacks who were now mainly sharecropping laborers was this: http://en.wikipedia.org/wiki/
Three more entries and then I am done with the Civil War and Reconstruction as far as this series is concerned.....HUZZAH!