Jurisprudence People wait in line to participate in early voting on Oct. 31, 2020, in Greenville, South Carolina. Photo illustration by Slate. Photos by Sean Rayford/Getty Images, JillianCain/Getty Images Plus, Smart/iStock/Getty Images Plus, and Larysa Stepanechko/Getty Images Plus. Sign up for  Executive Dysfunction , a newsletter that highlights one under-the-radar story each week about how Trump is changing the law—or how the law is pushing back. You’ll also receive updates on the latest from Slate’s Jurisprudence team. One big question has emerged in the wake of Louisiana v. Callais , the Supreme Court’s ruling this week that knocked down the Voting Right Act’s final remaining major pillar: How bad are things about to get? History is a good guide. Our work has shown that the court’s previous assaults on the act have wrought devastating consequences for voters of color. The impact of this decision likely won’t be different.…