"Former senior intelligence officials said in interviews that during the Trump administration, highly classified intelligence about sensitive topics, including about intelligence-gathering on Iran, was routinely mishandled," the newspaper reported. "One former official said the most highly classified information often ended up in the hands of personnel who didn't appear to have a need to possess it or weren't authorized to read it. That former official also said signals intelligence — intercepted electronic communications like emails and phone calls of foreign leaders — was among the type of information that often ended up with unauthorized personnel. Such intercepts are among the most closely guarded secrets because of what they can reveal about how the United States has penetrated foreign governments."
That pattern may not have ended when Trump left the White House after losing the 2020 presidential election to Joe Biden.
"A person familiar with the inventory of 15 boxes taken from Mar-a-Lago in January indicated that signals intelligence material was included in them," the newspaper reported. "The precise nature of the information was unclear."
Former acting Solicitor General Neal Katyal tweeted, "Signals intelligence (like electronic intercepts) are some of the most sensitive and secretive material in the US."
"There are a host of special markings and protections on every such document," Katyal noted.
The fact signals intelligence was reportedly recovered at Mar-a-Lago shocked national security professionals.
Retired USAF Gen. Michael Hayden, who served as director of the NSA and CIA, simply tweeted, "Jesus Christ."