1. Things legitimately get classified when they can damage the interests of the U.S. if learned by an “enemy”. Can’t possibly apply here with respect to the Russians because the Russians (including intelligence officers) were participants in the communications.
2. Things legitimately get classified (even innoccuous info) when their release can compromise the source that we hope to continue exploiting. Doesn’t apply here because the Russians are well aware western intelligence agencies constantly try (and are quite good at) intercepting and discerning the content of any and all of their communications. The Russians (as do we) assume that all communication via unencrypted EMails and phone calls are probably compromised.
3. Things legitimately get classified when their release can betray a method (like revealing we have broken a target’s best and most current encryption, e.g., WWII Enigma encoding). Doesn’t apply here because Russians already know NSA can break anything but Russia’s best military grade encryption. And if BOTH parties in these cases were making coordinated use of Russia’s best encryption, it basically proves the intent by the U.S. participants was espionage.
4. And if the content of leaked material was classified because it could be damaging if learned by foreign powers OTHER THAN RUSSIA, the American paricipants (who were not Government officials engaged in official Government business at the time) are guilty of espionage for unauthorized disclosure of information they had no legal right to possess or disclose.
So, even if one concedes the leaked info was officially classified by the U.S. Government, given the conditions stated in #1 through #3 above, exactly what serious harm to the national interest, if any at all, has resulted from its release? Alternatively, if the recent leakers of the intercepts are guilty of illegally damaging the interests of the U.S. under the conditions of #4 above, when will the original participants in the intercepted communications be arrested and tried for betraying sensitive state secrets to the Russians.