The lead attorney on the brief, David B. Rivkin Jr., a lawyer who served in the administrations of Ronald Reagan and George H.W. Bush, said the theory, if embraced by the Supreme Court, would not shield state electoral maps from challenges based on racial discrimination or other claims rooted in the U.S. Constitution or federal statute. But it would nullify other grounds for rejecting state maps, including claims of partisan gerrymandering. The Supreme Court in 2019 ruled that federal courts had no jurisdiction over claims of partisan gerrymandering, leaving that issue to state courts.