You can read my filing at this link . From the Introduction:

This case concerns an issue of first impression: In evaluating a claim that “race predominated” in the adoption of a redistricting plan in violation of the Equal Protection Clause, how should a court determine whether intent to separate voters on the basis of race predominated when that plan was adopted by voters via a ballot measure? As set forth below, because California’s voters were the ones who enacted Proposition 50—which put into effect a new congressional district map—the voters’ intent, and not that of the California Legislature that proposed the ballot measure, should matter in determining whether race was the predominant factor motivating the redistricting plan. Moreover, in discerning the voters’ intent, this Court

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