The Washington Post: Supreme Court to hear potentially landmark case on partisan gerrymandering
In the Wisconsin case, plaintiffs urged the use of a measure called the “efficiency gap” to determine how Republican mapmakers hurt Democrats with the main tools of gerrymandering: “packing” and “cracking.” These refer to packing like-minded voters, such as supporters of the same party, into a limited number of districts or cracking their influence by scattering them across districts in numbers too small to make an impact...
The case is Gill v. Whitford.