My first guess would be this year's Supreme Court decision about the Voting Rights Act.
Almost immediately after the ruling, a number of Republican states immediately put forth redrawn maps breaking up majority black districts.
https://www.theguardian.com/us-news/2026/may/14/southern-sta...
Another candidate would be the DOJ ending attempts at school desegregation:
https://www.nytimes.com/2026/09/24/us/politics/justice-depar...
Almost immediately after the ruling, a number of Republican states immediately put forth redrawn maps breaking up majority black districts.
https://www.theguardian.com/us-news/2026/may/14/southern-sta...
Another candidate would be the DOJ ending attempts at school desegregation:
https://www.nytimes.com/2026/09/24/us/politics/justice-depar...