The Supreme Court ruled last month that federal courts cannot rule on cases of partisan gerrymandering, saying that judges are not entitled to second-guess the decisions made by state legislators who draw voting maps. We spoke to one man who has long believed there’s a way to address the issue without the courts. Guest: Eric H. Holder Jr., who served as the United States attorney general for six years under President Barack Obama. For more information on today’s episode, visit nytimes.com/thedaily.  Background reading: The Supreme Court’s decision on gerrymandering instantly raised the stakes for the nation’s state legislative races, which are often overlooked by voters, but can shape the course of policy from abortion rights to education.What is gerrymandering, and why did the Supreme Court rule on it? Here’s a refresher.