By Jim Tankersley & Emily Baumgaertner    New York Times
March 27, 2018

WASHINGTON — The United States census is so much more than just a head count. It is a snapshot of America that determines how congressional seats are apportioned, how state and federal dollars are distributed, where businesses choose to ship products and where they build new stores. To do all that properly, the count needs to be accurate.

The Commerce Department’s decision to restore a citizenship question to the census beginning in 2020 is prompting concerns about curtailing participation and possibly undercounting people living in the United States, particularly immigrants and minority groups who are expressing discomfort with answering questions from census workers.

Wilbur Ross, the commerce secretary, acknowledged concerns about decreased response rates in a memorandum released on Monday night. But he said asking about citizenship would enhance the results by helping calculate the percentage of the population eligible to vote.

An undercount of the population would have far-reaching implications. It could skew the data that are used to determine how many congressional representatives each state gets and their representation in state legislatures and local government bodies. It would shape how billions of dollars a year are allocated, including for schools and hospitals. It would undermine the integrity of a wide variety of economic data and other statistics that businesses, researchers and policymakers depend on to make decisions, including the numbers that underpin the forecasts for Social Security beneficiaries.

Here are several of the commercial, political and research efforts that depend on accurate
census data:

Divvying up seats in Congress, state legislatures and more

The Constitution requires the government to enumerate the number of people living in the United States every 10 years, and to use that data to apportion the seats in Congress among the states. The calculation is based on total resident population — which means citizens and noncitizens alike — and it generally shifts power between the states once a decade, in line with population and migration trends.

States including Texas, Florida, Colorado and Oregon are projected to gain seats after the 2020 numbers are in. Illinois, Ohio, New York and West Virginia are among the states expected to lose seats. An undercount could shift those projections.

Lawmakers also use census data to draw congressional district boundaries within states, an often-controversial process that can help decide partisan control of the House. Census data also underpin state legislative districts and local boundaries like City Councils and school boards.

Handing out federal and state dollars

The federal government bases a large amount of its spending decisions on census data. Researchers concluded last year that in the 2015 fiscal year, 132 government programs used information from the census to determine how to allocate more than $675 billion, much of it for programs that serve lower-income families, including Head Start, Medicare, the Supplemental Nutrition Assistance Program, Pell grants for college and reduced-price school lunch programs. Highway spending is also apportioned according to census data.