The documents were released last week. The operative who was hired to devise the census passed away, his daughter turned over the hard drive. He explicitly said the goal is "to increase white voting power".
https://slate.com/news-and-politics/2019/05/census-memo-supreme-court-conservatives-white-voters-alito.html
This amazes me. For decades, Republican political operatives have said "we focus on race, and demonizing black people" and the right continue to say: "awwww no you don't". It's insane...