Pursuant to 22 USCS § 611 (b) [Title 22. Foreign Relations And Intercourse; Chapter 11. Foreign Agents And Propaganda; Registration Of Foreign Propagandists], the term foreign principal includes--and thus Biden a Foreign Agent, if he or the Board, or persons on his behalf, influenced or attempted to influence the US Government.(3) a partnership, association, corporation, organization, or other combination of persons organized under the laws of or having its principal place of business in a foreign country.”
To have VP of US threatening a president of your country into closing investigation against your company sure sounds like they got influence in US.