Even the House is slowly becoming less representative. The number of seats was capped at 435 back in the Taft era and states have rarely lost seats since[1].

With the 2020 Census likely in disarray due to both the Coronavirus and this administration's clear, documented intent to bias it "to Republicans and non-Hispanic whites,"[2] the crisis of representation will only worsen.

1. https://www.pewresearch.org/fact-tank/2018/05/31/u-s-populat...

2. https://www.nytimes.com/2019/05/30/us/census-citizenship-que...