By suddenly halting travel from Europe, the Trump administration ignored a timeless lesson of human migration: slamming borders shut usually has the opposite of the intended effect. Rather than ending cross-border movement, sudden immigration bans or caps create large and often unmanageable rushes of people hoping to make it across the border before it is too late. These surges occur immediately after bans are announced, when returning travelers rush to meet real or imagined deadlines, and often in the days and weeks beforehand, in anticipation of expected announcements. And when some of the people rushing to cross the border are carrying a potentially deadly virus, the result can be catastrophic.
The US government has screwed up every bit of the response, and the worst part instead of learning and adjusting they have doubled down on the crazy.