Even before taking office, former President Donald Trump's administration obsessed over the U.S. census.
From a failed bid for a citizenship question to a presidential memo about unauthorized immigrants that was fast-tracked to the Supreme Court, its moves over the past four years followed a playbook first drawn up more than four decades ago by the Federation for American Immigration Reform.
In 1979, the hard-line group that became the most influential advocate for extreme restrictions on immigration launched a campaign that has held onto one consistent goal — obtaining an official count of unauthorized immigrants through the census to radically reshape Congress, the Electoral College and public policy.
Starting with a lawsuit filed weeks before the official start of the 1980 census, FAIR documented its strategy in a paper trail that NPR has reviewed in the organization's archives at the George Washington University, as well as those of FAIR's founder at the University of Michigan.
"It's always been on the agenda," Dan Stein, FAIR's president, tells NPR, noting that it's "very possible" that, as early as November 2016, the group discussed with Trump officials the possibility of excluding unauthorized immigrants from a key set of 2020 census results.
To some, it may seem curious that part of Trump's agenda zeroed in on an often overlooked government tally of every person living in the U.S.
But census numbers hold what Trump has always wanted — power.
That power comes in the form of 435 votes in the House of Representatives and the Electoral College. Once a decade, those votes are up for grabs among the states based on new census numbers. The more residents included in a state's population count, the more of a say it has for the next 10 years in how federal laws are made and how the next occupant of the White House is chosen.
The Constitution has spelled out specific instructions for the census. Not just citizens or voters, but "persons" who reside in the states are supposed to be counted. Congress eventually codified the 14th Amendment's language into federal law that calls for the "whole number of persons" living in each state and the "tabulation of total population" to be used when reapportioning House seats and electoral votes.
Census counting does have a thorny history. Before the Civil War, the fifth sentence of the country's founding document required an enslaved person to be counted as "three fifths" of a free person. And it was just before the 1940 census that the Census Bureau determined the phrase "excluding Indians not taxed" could no longer omit some American Indians from the apportionment counts.
But since the first U.S. head count in 1790, this has been an unwavering truth: No resident has ever been left out because of immigration status.