Putting the “Oversight” structure together with the “Compartmented” intelligence security you will note that only a few people ‘could’ traditionally access the full PDB. However, under President Obama the President’s Daily Brief went to almost everyone at top levels in his administration. Regarding the Obama PDB:
[…] But while through most of its history the document has been marked “For the President’s Eyes Only,” the PDB has never gone to the president alone. The most restricted dissemination was in the early 1970s, when the book went only to President Richard Nixon and Henry Kissinger, who was dual-hatted as national security adviser and secretary of state.
In other administrations, the circle of readers has also included the vice president, the secretary of defense and the chairman of the Joint Chiefs of Staff, along with additional White House staffers.
By 2013, Obama’s PDB was making its way to more than 30 recipients, including the president’s top strategic communications aide and speechwriter, and deputy secretaries of national security departments. (link)
https://theconservativetreehouse.com/2018/01/08/how-the-fbi-and-doj-intelligence-units-were-weaponized-around-congressional-oversight/