@QasimRashid I think the shortest path is to raise the minimum citizen count for each state, to some reasonable number like 10 million, instead of the laughable 50,000 we have now. Empty states could join a compact (all of Idaho, Wyoming, Montana, north and South Dakota,) to be considered as one voting bloc with a unified federal representation.
Or, maybe, a voting right act with teeth could remove representation if the state fails at voting and is under federal court supervision. Score!