And for how long? You mention 30 days.
I guess I want to know more about such an action.
There are areas that are hard hit - NYC is in for a rough time.
So are parts of California, Florida.
But you restrict travel into/out of *those* areas. You don't do it for all areas - over the entire United States.
Prediction - if President Trump orders this - he will not be re-elected. People that lose their jobs - and there will be tens of millions - and are not near these COVID-19 hot spots, will blame him.
No amount of $1,200 checks is going to make up for wrecked retirements, bankruptcies, closed businesses, lost employment, etc.
No amount of "we beat COVID-19" will make up for the people who will lose so much financially. This will be especially true in areas that suffer no significant adverse casualties from COVID-19.
Truly hope I am wrong. But I believe President Trump will lose the election if he orders such a national lockdown.
They have Biden, you might want to rethink that.