His usual idiocy.
“Federalism” isn’t a fantasy.
Part of the problem is the time it takes to get things before any court. In this covid situation governors know that it takes way more than 120 days to get a case before any court. So by that time all these cases become moot because they will remove the restrictions thus opening society in their state. So they get away with it. Even if they charge and fine someone they will vacate those actions before the supreme court can make a ruling . So the next time this same thing will happen again. The second go round may well trigger more forceful resistance as it should.
Slavery died in December 1865.
Federalism died in April 1913.
Neither are fantasies; they just no longer exist in the US.