If the Trump administration gets its way, federal law will require this question to be asked of each person living in all of the country's households in 2020: "Is this person a citizen of the United States?" It's been close to 70 years since a citizenship question has been included among the census questions for every U.S. household.
In fact, the U.S. census has never before directly asked for the citizenship status of every person living in every household.