Rubbish! The discussion took place in December, well before Trump acceded to office. At that time he was still a private citizen, and couldn't do US government business at all. And where did you get that a foreign government's communication system would be used? They don't have phones in the USA?

Maybe you didn't realize it, but thanks to Obama and his pals in Saudi Arabia, Syria has become the worst blood-bath this century. Donald Trump didn't make that mess, but he now has to deal with it. Nothing came of the proposal for closer communications with the Russians on Syria, but it was smart of the Trump team to at least try to find ways to get a handle on it.