If Trump had nothing to do with the initial theft, then the subsequent dissemination is probably legal. The press regularly takes advantage of this distinction, as does Wikileaks.
It's more complicated. The press would almost certainly notify authorities before publication, if only to include comments (or "no comments") in their story. Trump, in this scenario, learns of the theft... and says nothing. Alerts no one.
Also, as a former Russia skeptic wrote in
Politico: "we learned that Russian hackers went after Hillary Clinton’s private office for the first time on the very day Trump said, 'Russia, if you’re listening, I hope you’re able to find the 30,000 emails that are missing.'"
Of course, you could contend that it's not Trump's fault, or that it's a mere coincidence. Maybe they were searching e-mails where Hillary shares her unfiltered thoughts on grandchildren and Iron Man.
No, it would not be illegal. I don't think you can criminalize the exercise of a legitimate presidential power. That seems like a clear constitutional violation of the separation of powers, granting Congress the ability to interfere with the executive in such a manner.
Most legal scholars disagree.
Of course you can criminalize the exercise of a legitimate power.
Suppose the FBI is investigating Dr. Keith's crime family. Dr. Keith pays a large bribe to the president to fire the FBI Director and end the investigation. Now, normally, this could be difficult to pin on a president because he could always argue that he fired the Director for a bunch of different reasons, but instead he appears on national television and said he did it because of the "Dr. Keith thing" (and testimony from witnesses present at private meetings corroborate the public admission).
It's potentially morally serious, depending on the details. But it's also just speculation.
The
premise of the scenario is that he knew a foreign government criminally interfered in the election (stole information). He subsequently lied about it to the public, saying maybe it wasn't Russia.
What was the scandal in Benghazi again? I know, there were so many. Wasn't one of the things that the Obama administration initially suggested that maybe it
wasn't a terrorist attack, but they knew. Oh, they definitely knew.