I’m glad he apologized. Perhaps his contribution to Confederate History Month henceforth should be reading the “cornerstone speech” by Confederate Vice President Alexander Stephens:
Our new government is founded upon exactly the opposite idea; its foundations are laid, its cornerstone rests, upon the great truth that the negro is not equal to the white man; that slavery subordination to the superior race is his natural and normal condition. This, our new government, is the first, in the history of the world, based upon this great physical, philosophical, and moral truth.