Might seem like a good idea, but it would not really be following the Constitution. At the time it was adopted, women, slaves, many men, & children could not vote, yet they were still counted (if only 3/5s in the case of slaves) to apportion representation. To count only citizens for representation would require an amendment, I think.
Good points.
In my opinion, everyone should be counted, but at the same time, we should know how many non citizens are here.
Just because someone is not a citizen, doesn’t mean that someone is here illegally.
If I recall correctly, after previous censuses, the census bureau issued estimates of the numbers of people who were not counted.