Getting an accurate count of America’s population has proven difficult in the 2020 Census as the coronavirus pandemic has hampered voluntary responses and forced officials to scale back door-knocking efforts.

The administration of President Donald Trump has placed other hurdles on the path to an accurate count. Its attempt to add a question about citizenship to the census earlier this year likely discouraged undocumented immigrants from filling out the survey, even though the administration's effort failed, demographics experts say. Local officials nationwide worry about the impact of undercounts on their communities.

"This is going to be the worst response rate we’ve ever had," said Lauren Reichelt, Health and Human Services Director for Rio Arriba County, New Mexico.