Russia is already under sanctions and has no significant trade with the U.S. — same as North Korea:
https://www.reuters.com/world/russia-cuba-north-korea-escape...
https://www.reuters.com/world/russia-cuba-north-korea-escape...
https://ustr.gov/countries-regions/europe-middle-east/russia...
https://translatingcuba.com/the-cuban-regime-celebrates-that...