Appotionment.
That being the distribution of a secret, magic sauce; a potion.
#facepalm
The census counts lots of things, tons of info is gathered.
The apportionment of Representatives is only one of many things derived from the census through ‘enumeration’.
Citizens and lawful permanent residents are guaranteed representation in Congress. Aliens are not represented. Aliens are aliens meaning they are unnatural, they do not belong here. They may be counted but they are not part of the enumeration for apportionment of Representatives.
That said, illegals have ‘coaches’ who game the system, who know the loopholes. They work to make a fraud on the system by passing off illegals as part of the enumeration. The more Representatives for illegals, the more power they have, the more money they receive.