Still struggling to think of any examples in which a ruling party embracing full-on explicit racism led to a positive outcome, either in the short term or long term.
The Chinese Exclusion Act and Jim Crow and Southern Strategy were all explicitly racist platforms put in place by the two major parties but I can’t think of long-term benefits that came from such naked bigotry. I think history has shown things tend to go better when everyone treats racism as something to be ashamed of.