Yesterday, the Supreme Court chose not to comment on a case that challenged how the size of a voting district is decided. In question was whether states should count everyone, not just U.S. citizens, when drawing districts. 

Currently, the court says election districts should be equal in size. Under this rule, state and city officials represent around the same number of people. The one-person, one-vote rule has been in place since the 1960s. 

The case was brought by a small, conservative nonprofit based in Virginia called The Project on Fair Representation, but could have had big implications for areas like Southern California. 

For more on the case, we're joined now by Rick Pildes, law professor at New York University.