Supreme Court declines to hear Pennsylvania Redistricting Case raising ISL theory

The U.S. Supreme Court has declined to hear Costello v. Carter, which involved a challenge to Pennsylvania’s court approved congressional map. The Pennsylvania Supreme Court adopted the map after a deadlock between the Republican legislature and the Democratic governor. Notably, the Costello case raised issues similar to those that the Court will resolve when it hears Moore v. Harper, the independent state legislature case, this term. NPR Correspondent Hansi Lo Wang has written a really useful and illuminating tweet thread on Costello, and its overlap with Moore.

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