Trump biographer says 'paranoid' president is too ‘unsophisticated and ignorant’ to argue based on facts and reality
Tim O'Brien is executive editor of Bloomberg Opinion (screengrab)

President Donald Trump's need for a "foil" to rage against is the result of his ignorance, a Trump biographer explained on MSNBC on Saturday.

Tim O'Brien, author of Trump Nation, joined David Gura for "Uppers" to analyze the president's habits of confrontation.

"I don't think it's only that he has a need for it, he enjoys it," O'Brien argued.

"He operates most of the time on one level, which is opposition, paranoia, dissent, division -- he's profoundly anti-institutional in a profoundly irresponsible way for the president of the United States," he noted.

"He also does it because he's unsophisticated and ignorant," he continued, saying Trump, "usually cannot argue things based on fact."

"He just not up to it," he concluded.