It's going to be pretty funny when the Russians promote Bernie because they think Trump can defeat him easily, and then he wins the Presidency. Of course, maybe that's Putin's ultimate game anyway: To get a Socialist elected as President of the US!
But of course, Putin is not a Socialist anymore. If he ever was.
Putin quote sounded something like: "Anyone who does not mourn the passing of the Soviet Union does not have a heart, but anyone who dreams of bringing it back does not have a brain."
Putin's dream does not involve the part of the USSR that involves "the second S" in any way, shape or form.
Putin would want to see the "Union of Soviet Imperial Republics", based mostly on the old Imperial Russian Empire model, with him as Tsar for Life, of course.