“must have something more than a mere majority even of voting age population in order to have a reasonable opportunity to elect a representative of their choice.” Ketchum, 740 F.2d at 1413. Courts have arrived at a 65% figure by beginning with a simple majority (50% plus one voter) and adjusting that figure upward by 5% to account for a younger population, 5% for low voter registration, and 5% for low voter turnout. See id. at 1415. This incremental 15% adjustment is merely an approximate corrective, used to evaluate minority voting strength when more specific voting data (e.g., VAP, registration, and turnout) is unavailable. See id. at 1413. When reliable VAP statistics are available, we may instead evaluate minority voting strength by using a 60% VAP rule of thumb. See id. (<HOLDING>); Prosser v. Elections Bd., 793 F.Supp. 859,
holding that the trial courts definition of normal use was harmless error recognizing the same rule in texas courts recognizing that courts commonly use 60 vap corrective holding that continued possession and unrestricted use constitutes regular use recognizing that the supreme courts earliest uses of the kings bench powers  commonly implicated the common law writs of mandamus and prohibition