Anyone who puts something in an email they do not want "spooks" to read is a moron.

What did the Russians find out? Donna Brazile fed Hilary the questions in the debate?

Nixon's burglary of the Watergate was from a different time - they hoped to get lucky with smoking gun evidence of deals and kickbacks, etc. they could exploit. J. Edgar Hoover did it all the time and had dossiers on all the players. But the biggest like FDR, Truman, et al and the Mafia had the goods on Hoover too so it was a kind of stalemate with certain favors extracted.

My conjecture is that when it comes to the most radical and egregious black ops there is a mechanism and protocol set up in advance to act quickly and silently with no records whatsoever. Plausible deniability. Like Putins's toxic agent attacks in the UK(locals totally blindsided)or hastily and clumsily getting rid of Lee Harvey Oswald and putting the lid on the story of a perhaps unexpectedly successful Russian-Cuban hit in vengeance for many attempts on Fidel's life orchestrated by the CIA. We chose to retaliate with a war in Southeast Asia.