The Logan Act expressly prohibits private citizens of the US from negotiating with foreign powers.
On November 10th numerous major news organizations reported that officials from within the Kremlin stated they were in constant contact with The Trump campaign leading up to the election.
From the Washington Post; MOSCOW — Russian government officials conferred with members of Donald Trump’s campaign team, a senior Russian diplomat said Thursday...The statement came from Deputy Foreign Minister Sergei Ryabkov, who said in an interview with the state-run Interfax news agency that “there were contacts” with the Trump Team. https://www.washingtonpost.com/world/moscow-had-contacts-with-trump-team...



