They let Brexit happen. I think if the rich can find a way to make money off of it, they certainly will. It won't be like...Amazon, who actually does benefit from interstate trade. It would be regional industries like steel or big agra that would want something like this, and they definitely have the money to push for it.

Alternatively even Amazon could benefit from it if they could setup a state without all the pesky labor laws that keep them from TRULY exploiting workers. So I'm not so sure that the rich couldn't find a way to benefit from it in a way they wouldn't be able to with the US as a whole