I don't know about Montana, but I know Texas has the infrastructure to make it. We are on our own separate power grid, we have
oil, refineries, a gulf port, a large farming and ranching community, and the attitude to make it happen. Our police structure can easily be changed to a national structure as we have the highway patrol as well as the Texas Rangers as a state wide police force. You then have County Sheriff and Constables. Then you get down to the local city PD.