Have Redistricting Reformers Found A Legal Test That Will Get SCOTUS To Rein In Partisan Gerrymandering?

Voting rights advocates have for years tried to formulate a legal test the Supreme Court could use to determine whether a partisan gerrymander was so extreme as to be unconstitutional. If such a test could be devised, they hoped, the Court might issue an opinion reining in extreme partisan gerrymandering. Their past attempts have been unsuccessful, but the justices have offered up opinions in various dissents and concurrences about what might work.