2. The Supreme Court will decide the battle over the way the nation tallies its population.

Hearing oral arguments today, the conservative majority seemed to back the Trump administration on allowing a citizenship question on the census. Critics say including it could depress participation and skew results.

The solicitor general, who represents the administration, said the question might be worth it: “You’re always trading off information and accuracy.”

A citizenship question has never been asked of all the nation’s residents in the census’ 230-year history, or of any since 1950. Including it, some experts say, could alter the political landscape for generations to come.