Seriously? The Grant administration was considered the most corrupt in US history. Most people do not believe this to be the fault of Grant, and nor do I. I believe this is the legacy of all the corruption that Lincoln brought into the government during his tenure.
I think Lincoln set the stage for wholesale government corruption, and the "deep state" has been selling influence and government policy ever since.
After the war there was so much more to steal and so many new opportunities. Pre war there was plenty of stealing. The Buchanan Administration featured a parade of Harding era types
But even during those periods of Republican national power Democrats were the party of Jim Crow, the KKK, Tammany Hall, lynchings, etc. in the areas they dominated. How decent and law abiding were and are the Democrat (and mob) dominated unions? Look at how they still govern cities and States into virtual cesspits. And speaking of Lincoln, when did Republicans actively plan the assassination of a Democrat President-Elect on his way to his inauguration? This latest attempt to overthrow an election they lost having underestimated the number of falsified ballots required is par for the course.