I’m OK with that. The Census routinely asked citizenship until 2010, when the 0bama administration abandoned that question. I’m sure they had a perfectly good reason for doing that.
Two articles from back in Jan 2010 -
https://www.washingtontimes.com/blog/watercooler/2010/jan/11/no-question-birthplace-asked-census/
https://www.dailykos.com/stories/2010/1/12/824455/-
And a failed attempt to change the 2010 census.
http://www.nola.com/politics/index.ssf/2009/10/census_bureau_knocks_sen_david.html