Each president is different in the manner and pace at which they receive their briefings, and Trump is not entirely out of step with some of his predecessors.

But with Trump, there is added concern as he is known not to read the accompanying briefing document, referred to as “the book,” that is put together by intelligence analysts in a highly labor-intensive process. This document is delivered in hard copy or on a tablet device to the president and his key advisers five days a week.