The Logan Act (1 Stat. 613, 18 U.S.C. § 953, enacted January 30, 1799) is a United States federal law that criminalizes the negotiation of a dispute between the United States and a foreign government by an unauthorized American citizen.

Does this really apply, as Trump doesn’t claim to negotiate on behalf of the US government? Getting instructions by a foreign president on how to overthrow democracy doesn’t count, I’m afraid.