That’s the best practical remedy, but I doubt that any legal remedy exists for implementing it. Too many lawyers have been involved over the years in lobbying for the laws (bar associations). Lawyers are made wealthy by chaos and harm against the best of Americans, and those are the evils that they lobby for (e.g., divorce laws).
Courts can order it. This was exactly the remedy ordered in my district in North Carolina last year. We had no US Representative for a year. Then we had a special election.