They are both security risks. The difference is the SA oligarch has already successfully infiltrated our national security and installed himself in a position of power so we can't do anything about it anymore.

Honestly the way he did it was pretty perfect. Create technology and weapons and R&D for the country you want to infiltrate, ingratiate yourself to it's people, government, and military. Then start throwing money into politics to buy yourself a spot on the cabinet.

This is a game any bad state actor with a huge wad of cash can play thanks to Citizen's United.