There are multiple trails of evidence to multiple treasons. Unfortunately the country is ridden with Repubs shielding him from justice. Repubs hate America since it is not yet a Christofascist dictatorship.

I don't think its so much that he didn't leave a trail as it is that he cronyized the institutions meant to hold him accountable.

The treason here would be in the moral sense, not the legal sense. He was President at the time he handed over the lists, and the secrecy of these lists derive from the power of the executive in the first place. He could hand out whatever classified documents he wanted to anyone, and it's 100% legal. Even without the Supreme Court recently expanding the "official acts" coverage, this would be easily covered.

Congress could have impeached him for it, but we all know how that would go. Voters rejecting him is the only real remedy.

He did not have the right to keep those docs at Mar-a-lago, however.

The media should be giving this far more attention than they ever gave to Hillary's emails.