Expand the House, too! I’d make it as representative as what they had when they designed the system: 3,929,214 people represented in the first Census by 65 Representatives by the end of the first Congress, or around 60,000 constituents per Representative. Taking that as a nice round number for our putative replacement for the Reapportionment Act, we’d end up with 5,524 Representatives. It’d effectively end the utility of gerrymandering, hugely dilute the extra votes in the electoral college given to states with small population, and could even make possible the rise of more than two parties acting in two coalitions, instead.