>>That’d take about 30 seats out of congress.<<
Not true. It would reallocate those thirty seats (assuming your number is correct...it’s probably really between one and three seats in play.)
But that’s a good argument for doing it. Why should states that harbor illegal aliens intentionally (CA?) gain representation in Congress (and an electoral vote as well) at the expense of another state?
Maybe the Demoncrats would consider counting illegals as 3/5ths of a person ...