Final answer:
Scalawags were supporters of Republican governments in the South during Reconstruction.
Step-by-step explanation:
The term used to describe Southerners who supported Republican governments in the South was Scalawags. Scalawags were white Southern Republicans who aligned themselves with the policies and goals of the Republican Party during Reconstruction. They were often seen as traitors by the more conservative white population in the South.
Learn more about Southerners who supported Republican governments in the South