[bilbo0s]

Even at the state level, it doesn't work.

If you take the original example, how would the state of Texas know where the kids who drove to Norman, OK are? They would need to, at a minimum, ask the state of Oklahoma. You scale that up and it's obvious that there has to be some mechanism for public health and law enforcement to act across state lines. That mechanism is obviously best implemented at the Federal level.

The government of Alabama can't be diddling about trying to find out who to call in Minnesota when they realize one of their residents left Birmingham just before a lockdown headed for Minnesota. Even worse, if the person was in a car, they'd have to check with every possible state, along every possible route to Minnesota. That's incredibly inefficient. We need Federal control of that stuff.