The simple solution presented here would work. There are other options as outlined in responses. I think converting major metro areas into states makes better sense for the future because that is where all population will be in a few more years. But we no longer have to time. We need to change this now.
I would suggest that a national public survey be done with at least three options for replacing the current disaster. That would be the new constitutional convention. Yes, it will never happen. But it must happen or we will not survive. Trump and most of the existing representatives need to be removed.
Idiots are blocking action to prevent us from losing all of our coastal cities. We must reorganize to prevent that. To complete carbon removal we must become a true democracy so that the small minority of crazy assholes who are dedicated to greed and destruction are stopped and prevented from ever again gaining control. They are incompetent and the planet is to delicate for their stupidity.