If they will not, then only the States can - and I think it can only be done via more simple, direct language in the document itself.
I know, I know. Who would ever have thought that the simple, direct language of the original document would not be simple or direct enough? But remember, we're talking here about politicians who have either been elected to congress or who have been appointed to their judicial position by a politician - they're not exactly the sharpest knives in the drawer. SIMPLE commands will be the most effective.
You cannot make the commands simple enough for those who have no intention of obeying them. We have already had a president who said it depends on what the meaning of is is.