A very informative article. Bookmark. We are stuck at 435 because congressmen like it. They’ll never willingly dilute their power.
435 is an arbitrary number and represents where we were when we stopped adding Congressional reps in the 1930s. Prior to then, we added reps every 10 years after the census. It’s a little known remnant of that era that should be corrected. There’s no written legal doctrine locking us to 435.