A problem with each state doing their own thing, is then the state can take away human rights, and wealthly people can simply move, less privileged people may be unable to. Of course the constitution is suppose to help with that by requiring all states treat everyone equally but of course they couldn't predict everything and states can simply interpret it as they see fit, so the federal government is needed, but how much is anyones guess. I don't see that de-polarizing america, rather just would be more silencing those in the minority of each state.