FY2020 Foreign Operations Appropriations: Targeting Foreign Corruption and Human Rights Violations [Updated April 17, 2020] [open pdf - 479KB]
From the Document: "To promote anti-corruption and human rights, the United States prohibits foreign corrupt actors and human rights violators from entering the United States. Currently, Congress provides for such a visa restriction in Section 7031(c) of the Department of State, Foreign Operations, and Related Programs Appropriations Act, 2020 (SFOPS, Division G, P.L. 116-94; 8 U.S.C. 1182 note). A variation of this provision has been in annual foreign operations appropriations since FY2008."
CRS In Focus, IF10905
Congressional Research Service: https://crsreports.congress.gov/