A demonstrator holds a sign about the U.S. census outside the Supreme Court in Washington, D.C., in 2019. The Census Bureau has stopped all work on President Trump’s directive to produce a count of unauthorized immigrants that could be subtracted from a key set of census numbers, NPR has learned.

A demonstrator holds a sign that reads “Everyone Counts” outside the U.S. Supreme Court in Washington, D.C., U.S., on Thursday, June 27, 2019. The Supreme Court issued a mixed decision on the Trump administration’s bid to add a citizenship question to the 2020 census, saying the Commerce Department’s explanation for adding the question was inadequate. Photographer: Andrew Harrer/Bloomberg via Getty Images