Tom Nichols, a conservative professor at the Naval War College in Rhode Island, said President Donald Trump is incapable of understanding the information presented to him about national security or any other topic.
Senior intelligence briefers warned that Trump stubbornly disregards their analyses, despite their efforts to keep his attention with visual aids and by repeating his name, and Nichols told MSNBC's "Morning Joe" that the president lacked the ability to learn.
"He's unbriefable -- you can't explain things to him," Nichols said. "He doesn't take in information, so he tends to just wing it and to say things that are convenient to the way he wants to see the world."
Nichols said the president revealed his limitations every time he speaks, and he said the problem puts the U.S. at great risk.
"None of this makes any sense," he said, "and I think it indicates the degree to which you can see that frustration coming out of the people in the national security environment who have to talk to him and try to kind of break through that shell of things he already believes, and (they) probably don't succeed very often."