The most likely and obvious scenario due to all the huge volume of emails is that it was most likely someone from inside the NSA. It would be no problem for them at all.
Yeah. I think there are lots of mid level patriotic career types in all the Intelligence agencies who are refusing to sit by and watch as their politically appointed globalist Marxist superiors sell us out.
It would be so easy to safely leak stuff with the Internet and Wikileaks, etc. Back in the day you’d have to risk smuggling out physical documents and going to a NY Slimes reporter as a deep throat - now you just slip in a thumb drive or push an upload button.
Especially since lots of this stuff has already been mishandled to begin with by the time it comes to their attention, it’s already insecure.