Here's a man with all sorts of US intel - a Three Star military guy - someone who should be so well aware of his position in America, I guy by his own words "we need to stand by the rule of law in America" and he gave away US intel, sold his position to another country for cash payments. He was an officer in the US military. He did these things with a clear conscience.
He could give away all of Trumps secrets but he still should be held accountable. Maybe not by hanging, but significant jail time.
I'd be surprised if the Military doesn't take him to trial and do it themselves.