Definition - What does Executive Privilege mean?
Executive privilege refers to the power and authority of the President and other high officials to keep certain communication and information private, as disclosing these would hinder the decision-making process.
Justipedia explains Executive Privilege
In the case of criminal cases and charges, the power of executive privilege maybe denied. Richard Nixon was not allowed to exercise this power in a famous Watergate scandal where he tried to limit the access of important documents and tapes to Congress and officials.