Well, it seems it should be investigated. Should we take his word for it? What if George Soros was calling Putin?Musk is a private citizen, he can talk to whomever he wants to.
The Logan Act stops people from negotiating disputes with the US, but other than that, not a problem.
Logan Act
Law
The Logan Act 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. The intent behind the Act is to prevent unauthorized negotiations from undermining the government's position. Wikipedia
#HYPOCRITES