It was illegal to take the citizenship question off the census form in the first place!
https://www.americanthinker.com/blog/2019/07/how_president_trump_can_use_14th_amendment_to_put_citizenship_question_back_on_the_2020_census.html
https://www.americanthinker.com/blog/2019/07/how_president_trump_can_use_14th_amendment_to_put_citizenship_question_back_on_the_2020_census.html