Before the 2020 census begins in the United States, a case has been fast-tracked to the nation’s highest court about who is counted and why. It has become the biggest case in front of the Supreme Court this session. Guest: Adam Liptak, who covers the Supreme Court for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.

Background reading:

• The Supreme Court’s conservative majority appeared ready to allow the Trump administration to add a question about citizenship status to the 2020 census. A decision is expected in June.
• Political maps based only on the citizen population could tilt in favor of Republicans.