Even if illegals do not vote (I believe most do not?!) they are still represented, because the districts include them.
If the noncitizens were uniformly distributed or there were infinitesimally small number of them, counting them would not make too much difference.
But this is not the case.
If you look at any recent election, you can add all votes cast. You will find massive disparity in cast votes between different districts.
One average districts should have about 900,000 citizens and some do. Some have even more!
But, on the other hand, there are districts with only some 300,000 citizens.
The rest are noncitizens and a lot of them (most in many districts) are illegals.
it means that the congress perron of this district is basically representing mostly non-citizens.
Yeah, you are somewhat right.
There are House seats that represent districts of fewer than 330 million / 435 = 758,000. For example, Alaska has 1 seat and total population lower than 758K. Wyoming — 580K. Vermont 647K.
So the whole matter is not straightforward, and my recall is the Constitution phrasing for counting in a Census has the word “persons” in it, not citizens. So this is going to be a tough fight.