I haven't looked into it but this would be my guess. Do not take my comment as a statement of fact
Also... technically most of Europe now. Not sure if you want to include that seeing as it's a temporary measure (for now) and is based less on Trump's desire to restrict immigration and more his belief that it will halt the spread of corona.
A few moments later Melania said, "Donald, you are the smartest man in the world. How many people do you think live on the moon?'. Without hesitation Donald said, "200 million". Melania thought about that for a moment and said, "Wow! It must get awfully crowded when it's a half moon".