The core of your argument falls apart because the
Post# of 123549
https://www.latimes.com/nation/la-xpm-2013-ju...story.html
The states covered under the Voting Rights Act were Alabama, Georgia, Mississippi, Louisiana, South Carolina, Texas, Virginia, Arizona and Alaska. Also included were five counties in Florida, three boroughs in New York City and three counties in Central and Northern California — Monterey, Kings and Yuba.
At first, the covered jurisdictions were those that used literacy tests or poll taxes. In the 1970s, the formula was expanded to include jurisdictions where less than 50% of the eligible residents voted.
Also, your % of people of various hues is NOT reflected in the makeup of the legislature which is solid GOP and way more than 50% white.
https://ballotpedia.org/Party_control_of_Sout...government