[aredox]

>On your second point, undocumented immigrants also count in the census

Except immigrants choose where they want to live.

The prisoners are where they are because the party in power (usually Republican, borderline neo-Confederate) creates laws that lead to extensive incarceration (such as "three strikes") and is the one which decides where to build prisons, which results in biased elections in their favor. Which reeks of the pre-civil war rules that slaves count for political weight.