The US states are like EU nations. They only give up control of anything that passes their borders (and a few other things like the right to leave the union uni

The US states are like EU nations. They only give up control of anything that passes their borders (and a few other things like the right to leave the union unilaterally). As the US is much older than the EU, its economy has evolved so effectively everything passes a states border giving the federal government the right to control almost every aspect of life (except things explicitly barred from it). However, the moment the federal government institutes a state by state lockdown, control immediately reverts back to the states since nothing crosses the borders any longer.