n Wednesday, the Supreme Court issued an astonishing decision throwing out Wisconsin’s new legislative districts as a violation of the Equal Protection Clause. The majority accused a Republican justice on the Wisconsin Supreme Court of greenlighting a “racial gerrymander” by creating one more majority-Black district in the State Assembly. Wednesday’s unsigned decision, issued through the shadow docket, hands Wisconsin Republicans an unexpected victory in their quest to reduce Black representation in the legislature. It also alters the law of redistricting in fundamental yet cryptic ways that might, to a cynic, seem designed to disadvantage Democrats in every single case.