Suspension of Entry of Immigrants and Nonimmigrants Who Present a Risk to the United States Labor Market During the Economic Recovery Following the 2019 Novel Coronavirus Outbreak: Proclamation 10052 by the President of the United States of America, June 22, 2020 [open pdf - 240KB]
Proclamation 10052 was issued by the President on June 22, 2020. From the Document: "Historically, when recovering from economic shocks that cause significant contractions in productivity, recoveries in employment lag behind improvements in economic activity. This predictive outcome demonstrates that, assuming the conclusion of the economic contraction, the United States economy will likely require several months to return to pre-contraction economic output, and additional months to restore stable labor demand. In light of the above, I have determined that the entry, through December 31, 2020, of certain aliens as immigrants and nonimmigrants would be detrimental to the interests of the United States."
Federal Register: http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR
Federal Register (June 25, 2020), v.85 no.123, p.38263