Trump has opted to rely on an oral briefing of select intelligence issues in the Oval Office rather than getting the full written document delivered to review separately each day, according to three people familiar with his briefings.

Reading the traditionally dense intelligence book is not Trump’s preferred “style of learning,” according to a person with knowledge of the situation.

The arrangement underscores Trump’s impatience with exhaustive classified documents that go to the commander in chief — material that he has said he prefers condensed as much as possible. But by not reading the daily briefing, the president could hamper his ability to respond to crises in the most effective manner, intelligence experts warned.