Rage by Bob Woodward:
Jared Kushner’s unorthodox ties to foreign leaders and regular conversations with them outside secure channels raised suspicions among the intelligence agencies.
His interim Top Secret security clearance was downgraded and ultimately denied. The rejection meant Kushner could not have access to sensitive intelligence, impeding his ability to work.
White House chief of staff John Kelly wanted Kushner’s security clearance handled by the book, but the president personally ordered that Kushner be granted the highest security clearance. This gave him access to Top Secret intelligence classified as Sensitive Compartmented Information (SCI) and fed a constant tension between Kushner and Kelly.