My guess is that there's nothing in that article about Nixon and the Southern Strategy, or Reagan kicking off his 1980 campaign in Philadelphia, MS while mentioning States rights (for the uneducated, Philadelphia, MS is where 3 civil rights workers were murdered in 1964), or George Bush Sr's campaign running ads about Willie Horton, or the current Republican Party purging voter rolls of blacks in Southern States, or how black districts continue to have too few voting machines to serve the people who are forced to stand in line for hours while predominately white districts have no such problem.
Or should I bother to read the article because those, and other, examples are included?