Five years into the redistricting cycle, we're still litigating racially gerrymandered voting maps. Today, we’re looking at a principle called the “Gingles Test” that federal courts use when determining whether a gerrymandered redistricting map is a violation of the 1965 Voting Rights Act. How that test is interpreted can determine whether minority voters can elect the candidate of their choice, or their vote is diluted by an anti-voter state legislature.