It could be over 10 people who have not been cleared to handle top secret material. Why haven't these 10 plus people not been given a security clearance , simple they have potential to be black mailed. They have done things in there past that are unsavory , maybe illegal or just very embarrassing .
Foreign agents could be making these people targets. Turning them into moles and using them as a source of information on what's going on in the White House. That makes us less safe.