Wang gives us both a history of voter suppression tactics in the USA since the end of Reconstruction, and a strong case for the illegitimacy of voter suppression as a means of partisan competition.
Some will remember at least some key facts about the use of poll taxes and literacy tests to prevent African-Americans from voting in the post-Reconstruction era. Even those readers may be startled at the extent of the suppression and the strength of its effects, as well as parallel efforts in northern states to limit the votes of "undesirables" there. Wang follows the evolution in both tactics and in who was interested in suppressing whom.