Frankly, that's a ridiculous scenario. States are an artificial construct. There's no reason California couldn't be split into five states so they can get more senators, and there's no reason tiny east coast states couldn't be merged together. It's just a matter of political will. States rights do nothing to benefit the individuals living in those states. Often when we talk about states rights, states are imposing some kind of oppression or restriction on their citizens, abortion being the most recent example. The Supreme Court threw it back to the states, many of which banned it immediately.

The states don't matter! They're overgrown, glorified municipalities. If we are going to redesign the system, we need to reduce their power all together. States are a relic of a colonial system founded by the British, where each colony was individually granted a charter, and a of a constitution written at the same time the Holy Roman Empire was alive.

What stops ridiculous, punitive laws from being passed? What stops them from being passed now? The courts, for one, and the federal government. Often it's the states that are trigger happy in committing some kind of mayhem.

We've lived with states for so long that we've been gaslit into thinking that their existence is in our best interest. While states might be useful in some form, like in organizing regional infrastructure projects, their power should be diminished, and they are not deserving of house on par with the house of the people.

Of course, Congress is in need of other dire reforms as well. It should be bigger, for one, and first past the post should be replaced with some kind of alternate system (perhaps California-style jungle primaries?).